Through this lecture, I focused on quickly conveying the new contents and new development paradigm about the chatgpt API that came out in March, and rather than a lecture that explains prompts like other expensive chatgpt lectures on the market, I tried to convey useful contents by creating something that can be applied to products using the chatgpt API itself. Since I am not a professional lecturer, it may feel that the lecture preparation is insufficient, but that is a pity...