A. History and Development of the Company Our business was founded in June 1997 and our company was incorporated on July 6, 1999 under the Cayman Companies Act (As Revised). Our principal executive offices are located at Room 802, 8/F, China Life Centre, Tower A, One HarbourGate, No. 18 Hung Luen Road, Kowloon, Hong Kong. Our telephone number is +852 2791 5088. Our key business milestones are summarized below: ​ Our principal capital expenditures for 2023, 2024 and 2025 consisted mainly of expenditures related to our new office buildings in Shanghai and Hangzhou in China and the acquisition of new servers in connection with the operation of our business for a total of approximately RMB2.3 billion, RMB1.3 billion and RMB1.1 billion, respectively. As of December 31, 2025, we had capital expenditure commitments of RMB147.1 million (US$21.0 million) for 2026 and thereafter, which primarily consist of commitments made in connection with the construction of new office buildings in Shanghai and Hangzhou.