On October 16, the offline event of the blockchain platform Solana originally scheduled to be held in Shanghai was abruptly canceled, with about 8 to 9 law enforcement officers appearing at the scene; participants waited outside the door for over an hour and were unable to enter. Two days earlier, Solana had still placed a high-profile advertisement on a large screen on the Shanghai Bund, and the foundation chairman said that the advertisement caused registrations to exceed the upper limit of the filed number, so the postponement was decided.[social control][Shanghai][Cryptocurrency][Solana]