For the purpose of expressing confidence in the long term value of the Company, Mr. Bin (Tony) Zhao, founder, chairman and CEO of the Company, Mr. Sheng (Shawn) Zhong, CTO and Chief Scientist of the Company, Mr. Jingbo Wang, CFO of the Company and Mr. Robbin Liu, Vice President of the Company, who comprise all executive officers of the Company, voluntarily undertook, pursuant to the terms contained in the letters of undertaking given to the Company, that they and entities controlled by them shall not in their discretions sell any shares of the Company directly or indirectly beneficially owned by them, until December 31, 2025, save for up to 0.4 million ADSs (representing 1.6 million class A ordinary shares of the Company) to be sold by Mr. Zhong for personal financial reasons. Mr. Zhong expects the sale to be completed by December 31, 2024.