How to Make the Flood of Knowledge Your Own

Hello everyone, I'm Winterlood (Lee Jeong-hwan).

Did everyone have a good Lunar New Year?

The Lunar New Year holiday is all over, but...

I've come like a magpie bringing gifts for you all 😂

Lunar New Year Course Review Event Guide

• 50% discount coupon for all participants (Choose 1 from the One Bite series lectures)

• 100% discount coupons provided to 30 people through a lucky draw

• Just verify your course review to complete your participation! (Previously written reviews are also OK)

• Participation: https://link.onebitefe.com/r/4qh6ef

   

Click the image above to go to YouTube (the embed wasn't working ..ㅠ)

If even that doesn't work, please click the link below.

https://youtu.be/WE2QnI0T6Ts

We look forward to your active participation.

I am always grateful, and Happy New Year!

Best regards, Junghwan Lee 🙇🏻‍♂️

🏆 Please participate in the 2025 Hanip Survey

• We will provide a 35% course discount coupon to everyone who participates in the survey,

• Through a raffle, we will provide 100% course discount coupons

Hello, this is Lee Jeong-hwan

To commemorate the end of 2025, we are conducting the Hanip Community Year-End Survey 🏆

* Survey results will be compiled and shared on the cafe by January 9th (Friday)

🔗 Survey Form Link: https://link.onebitefe.com/r/hgy83a

If the above link doesn't work: https://forms.gle/CbQNV244TrXX7T4d8

For those who have completed the survey submission

A very special gift is also prepared 🎁

[ Participation Reward Information ] ‣ 30 winners selected by lottery: 100% discount coupon for 1 course of your choice (including new courses, scheduled to launch April-May 2026) ‣ All participants: 35

[ Participation Rewards ]

‣ 30 people selected by lottery: 100% discount coupon for 1 course of your choice (including new courses, scheduled to launch April-May 2026)

‣ All participants: 35% discount coupon for 1 course of your choice (including new courses, scheduled to launch April-May 2026)

(If you choose a new course, receive a 55% discount coupon, higher than the pre-registration event!)

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[ How to Participate ]

‣ How to participate: Submit survey results

‣ Participation Period: 12.31(Wed) ~ 01.04(Sun) until midnight

‣ Results announcement: Monday, 01.05, during the afternoon

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[ New Course Announcement ]

‣ The topic has not been finalized yet.

‣ We are currently considering topics in CS areas (networks, data structures, etc.).

‣ Scheduled to be released in April-May 2026.

[ Guidance ] ‣ The topic has not been finalized yet. ‣ Currently considering topics in CS areas (networks, data structures, etc...). ‣ Scheduled for release in April-May 2026.

[ Notice of Precautions ]

‣ If you enter your email incorrectly, we may not be able to notify you of winning or deliver your coupon. Please make sure to double-check

‣ Duplicate entries are not allowed. Thank you for your understanding.

🔗 Survey Form Link: https://link.onebitefe.com/r/hgy83a

If the above link doesn't work: https://forms.gle/CbQNV244TrXX7T4d8

The results of this survey will be used as the basis for determining the direction of course production in 2025.

Your responses will be reflected in the actual courses.

Thank you all so much.

- From Jeong-hwan Lee 🙇‍♂

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PS. The survey results will be compiled and shared on the cafe by January 9th (Friday)!

Celebrating the 2025 Inflearn Awards "Bestseller" Win

50% Off: Bite-Sized TypeScript

Hello everyone, this is Lee Jeong-hwan 😀

Bite-Sized TypeScript Course

Selected as "Best Seller" at Inflearn Awards 2025!

- Source: https://inf.run/NbuwA

- Faces have been blurred to protect the portrait rights of the fellow knowledge sharers who received awards together

​

Thank you sincerely for all the love you've shown us over the past year.

We've prepared a massive discount event to show our appreciation for your love and support!

Event Information

We're distributing 50% discount coupons for the Bite-Sized TypeScript course!

(Limited to first 500 people)

You can find discount coupons in the cafe announcement below.

https://link.onebitefe.com/r/45jc3w

Acknowledgments

Thank you for sending so much love that allowed me to receive such a wonderful award at the end of the year

I would like to express my sincere gratitude to all students and readers.

Thanks to all of you, I was able to wrap up this year warmly.

​

I will continuously strive to bring you more good news, useful and enjoyable stories, even during these difficult times.

I'll work hard until the end with the same enthusiasm I had when I started, without wavering. Thank you so much.

​

I sincerely hope you have a warm year-end filled with as much warmth as the love you've shared with us.

I will always support and work hard. Thank you.

​

- From Lee Jeong-hwan

Hello everyone, this is Lee Jeong-hwan 😀

We are pleased to announce the Hanip Community Course Review Event!

For detailed information, please refer to the announcement or image below!

Notice Link: https://link.onebitefe.com/r/5uoyp5

Thank you always. Wishing you a warm and happy end of the year!

Hello everyone, this is Lee Jeong-hwan 😀

Do you happen to be interested in Java as well?!

I'm ready to translate Korean

For all of you!

I participated in the production of this high-quality Java basics course,

I've brought you a discount coupon that lets you take the Kind Java Tour course for just 1,000 won.

- The coupon expiration date is until midnight on December 7th,

- Quantities are limited and may close early once sold out 🥲

I'm ready to translate Korean

🎁 1,000 KRW Course Voucher Link: https://link.onebitefe.com/r/43eqpy

Kind Blender Java Course Introduction

Kind Java Tour is

This is a course created by my long-time acquaintance, Dugang (Park Du-won).

I'm ready to translate Korean

Dugang has about 3 years of experience working as a backend developer at an e-commerce company

Based on this practical experience, you planned and created a Java fundamentals course yourself.

I'm ready to translate Korean

Throughout the process of creating the course, we consistently exchanged opinions and established direction together,

I worked together to improve the quality in various aspects, such as providing actual feedback and refining the PPT together.

Since we went through this collaboration process!!

that will fully satisfy the members of the Hanip community

I can confidently say that this is a lecture that came out quite well with high quality.

If you've been interested in learning Java basics, I highly recommend this!!

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You can also receive coupon discounts through the link below 👇👇👇

🎁 1,000 KRW Course Coupon Link: https://link.onebitefe.com/r/43eqpy

We appreciate your interest!

Hanip Challenge 7th Cohort Recruitment Notice (Until 25.12.07)

PS. Starting from the 7th cohort, it will be provided as a paid service along with the Inflearn challenge feature.

What is the One Bite Challenge?

The Hanip Challenge is a course completion challenge that progresses through missions and a progress tracker.

This course was designed based on the fact that many people find it difficult to complete courses

As a course creator, I take full responsibility and ensure that students never feel alone!

I hope you enjoy completing the entire course with this purpose in mind.

How does it work?

Participants will be provided with a progress tracker and daily review missions.

Follow the progress schedule to take the classes and complete the review missions before submitting them.

We'll help you track your daily learning progress through the mission checker.

PS. Starting from the 7th cohort, we'll be using Inflearn's Challenge feature!

What kind of course will it be?

The One Bite series courses (JavaScript, React.js, TypeScript, Next.js) are running simultaneously.

Unfortunately, the practical project course is not offered as a challenge 🥲

Application Method

1) Apply for a challenge on your desired topic

First, you can apply to participate in your desired course through the link below.

• Complete JavaScript in One Course

• React.js in Bite-Sized Pieces

• Bite-Sized TypeScript

• Next.js in Bite-Sized Pieces

2) Apply for Free Live OT

Following the instructions above, if you have applied to a challenge on your desired topic

You can apply for the free Live OT for challenge participants through the link below.

Apply for Live OT

PS. Recordings will be provided!

Thank you for your interest 🙇‍♂

Hello everyone, this is Lee Jeong-hwan 😀

Is there anyone who might be having concerns like the ones below?

​

"I want to work on a proper project, but... I'm not sure what topic I should choose"

"Design, backend, requirements gathering, and more... I want to focus only on frontend development, but there's too much to do"

​

I really want to work on a project, but...

For those who cannot take on various challenges and difficulties

We've prepared a collaboration event with PROKIT😀

What is PROKIT?

Project Kit for Those Who Dream of Becoming Professionals - PROKIT

PROKIT is a resource collection (kit) for frontend projects

Business scenarios, planning requirements, design mockups, backend servers, and other

It consists of various materials for conducting practical projects.

​

Focus solely on implementing frontend functionality

You can directly develop a study timer service (DevTime) like the one below ⬇

Login and Sign-up Features

Timer and to-do management features

Dashboard, Ranking Features

​

PROKIT is currently being sold through Inflearn's clip feature.

Please check the link below for detailed information 😀

https://inf.run/r8d5Y

Who created PROKIT?

This is a project created by my benefactor, who was with me at the beginning of the One Bite series.

PROKIT guided me to take my first steps as an instructor,

who helped make the current One Bite series possible

This is a new project planned by Ko Young-jae, CEO of NYBS.

Youngjae Ko has been planning IT education content and curricula for a long time

This is someone who has helped create the beginnings of countless instructors.

​

I also spent a long time with Youngjae Ko while preparing the One Bite series,

In that process, we naturally came to share similar philosophies and directions.

I believe you will also be able to feel the sincerity and depth through PROKIT.

​

Half of it is my heart cheering for Youngjae's new beginning,

And with the expectation that it could be helpful to all of you

We have prepared this collaboration.

Collaboration Event 1.

Live Session (Nov 12) 1,000 KRW Discount Event

✦ Paid Live Session Information

On November 12, 2025, to celebrate the launch of PROKIT

How to Grow Rapidly with Projects and AI on the topic of

We are planning to conduct a paid live session (5,000 KRW) on Inflearn.

PS. I will also be participating in this live session as a moderator (MC).

​

✦ Discount Event Notice

For Hanip Community members at a significantly discounted price of 1,000

We have prepared benefits that allow you to participate in live sessions.

You can apply for the live session using the discount coupon below!

Discount Coupon Link: https://inf.run/HojUV

​

Collaboration Event 2.

When you purchase PROKIT, we'll give you a discount coupon for the One Bite series.

​✦ Event Information

PROKIT To everyone who purchased,

We provide a 35% discount coupon for the One Bite Series 3-course bundle (React, TypeScript, Next).

​

✦ How to Participate

After purchasing the PROKIT resource collection,

Please capture the purchase screen and apply through the Google form below!

https://forms.gle/DYLE1ig9aH87g4fm6

​

✦ Schedule

This promotion will run for approximately 3 weeks until November 17th.

Coupons are issued every Monday as follows.

- 1st Issuance: November 3, 2025 (Mon)

- Second issuance: November 10, 2025 (Mon)

- 3rd Issuance: November 17, 2025 (Mon)

​

Discount coupons will be sent to the email address you submitted with the survey

The coupon application validity period is 3 days.

If you have any questions about purchasing PROKIT materials or promotion events

nybs.contact@gmail.comPlease contact us at

This notice is a re-announcement following the first notice issued 5 days ago.

Just in case there are those who might not have seen the announcement...

Please understand that we are announcing this again 🙇‍♂

Every time we hold a pre-registration event

There are quite a few cases where people miss the announcements and can't apply 🥲

The production of the new course Bite-sized Real-world Projects - SNS Edition has been completed.

This Thursday, October 23rd (Thu) in the morning, it is scheduled to be released.

Therefore, we are accepting pre-registration event applications until midnight on Wednesday, October 22nd (Wed) of this week!

About 1,000 people have applied so far 🔥

Pre-registration Event Notice

To commemorate the launch of a new course, we are once again holding a pre-registration event!

We're planning to give away free coupons to a total of 100 people this time, on a larger scale than before 😀

✦︎ Event Benefits Guide

50% discount coupon provided to all applicants

100% discount coupon provided to 100 randomly selected winners

✦︎ Event Schedule Information

Application Period: Until midnight on October 22nd (Wed)

Winner announcement and coupon distribution: Thursday, October 23rd afternoon

✦︎ How to Participate

Please apply through the Google Form below!

https://link.onebitefe.com/r/25op2i

Course Introduction

This course is about building a professional-level SNS project together using React.js + TypeScript + Supabase. You can check the detailed course introduction through the link below 😊

✦︎ Detail Page Preview : https://link.onebitefe.com/r/f7lgu6

✦︎ YouTube Introduction Video : https://youtu.be/3Jn9ELD9jqg

To the students who always support us so that we can release this lecture and

I would like to express my gratitude to all the people around me who have helped in many ways with the production of this course.

Thank you for your interest. Thank you 😃