Core Viewpoint - The Beijing Stock Exchange (BSE) is transitioning to a new stock code system to enhance stock identification, with a new code segment starting with 920 being implemented as per the China Securities Regulatory Commission's directive [3][4]. Group 1: Code Change Rules - The stock codes will change such that the first three digits will uniformly become 920, while the last three digits will remain unchanged [4]. - In cases where the new stock codes result in duplicates, the fourth digit will be adjusted sequentially based on the listing time to ensure each company's code is unique [4]. Group 2: Code Change Process - The BSE has published a comparison table of old and new stock codes for existing listed companies, which can be accessed on the BSE official website [5]. - As of May 2025, the BSE will initiate the new stock code for a pilot group of 6 stocks, while the remaining 242 stocks will continue using their existing codes until a stable transition is confirmed [6].