Certain A Shares of Keystone Technology Co.,Ltd. are subject to a Lock-Up Agreement Ending on 12-AUG-2022. These A Shares will be under lockup for 374 days starting from 3-AUG-2021 to 12-AUG-2022. Details: The shareholder, Zhang Jianwei has agreed not to dispose off any shares within 36 months since the listing date. If, within 6 months after the issuer's listing, the closing price of the shares is lower than issuance price for 20 consecutive trading days or if trading price is lower than issuance price after 6 month from listing, lock-up period will be automatically extended for another 6 months. After the expiry of the lock-up period (including the extended lock-up period), the parties promise that yearly transfer of shares made by them will not exceed 25% of the holding, both direct and indirect, held by the present parties. After 6 months from rescindment, there will not be more transfers of shares, either direct or indirect. If any of the parties were to resign within 6 months from the present IPO, neither direct nor indirect holdings might be transferred or sold for 18 months since the date of rescinding. If the parties resign within 7 to 12 months after the IPO, neither direct nor indirect holdings might be transferred or sold for 12 months since the date of rescinding. The shareholders, Men Fangfang and Wang Shunli have agreed not to dispose off any shares within 12 months since the listing date. If, within 6 months after the issuer's listing, the closing price of the shares is lower than issuance price for 20 consecutive trading days or if trading price is lower than issuance price after 6 month from listing, lock-up period will be automatically extended for another 6 months. The shareholder, Zhenjiang Guanxiang Enterprise Management Center (Limited Partnership) has agreed not to dispose off any shares within 36 months since the listing date. The shareholders Ningbo Longxin Equity Investment Partnership (Limited Partnership), Ningbo Meishan Free Trade Port Yongjie Equity Investment Partnership (Limited Partnership), Shanghai Xianghe Yongyuan Equity Investment Partnership (Limited Partnership), and Shanghai Yong Ji Huachuang Equity Investment Partnership (Limited Partnership) have agreed not to dispose off any shares within 12 months since the listing date.