How to Grow into a Sustainable Sales Professional in the AI Era: Practical Mindsets from a 30-Year B2B Sales Expert You’ve learned sales skills, so why are your results still stagnant? Sales techniques and communication methods become outdated over time. Sustainable performance comes from a rigorous mindset and expertise as a sales professional. We share the living, practical mindset developed over 30 years by CEO Joo-min Park, author of 《Promise》, Korea’s first book on B2B cold-call sales, recipient of the '100 Sales Professionals Who Shined at Samsung Electronics Award', and honoree of the 'Korea’s Outstanding Lecturer No. 229' distinction.