Beijing Jincheng Tongda (Shanghai) Law Firm's Legal Opinion on the Achievement of the First Lifting Conditions for the Restricted Stock of the Reserved Grant Portion, the Achievement of the First Exercise Conditions for the Stock Options of the Reserved Grant Portion, the Repurchase and Cancellation of Certain Restricted Stocks, and the Cancellation of Certain Stock Options under the Company's 2023 Restricted Stock and Stock Option Incentive Plan