Withdraw $2,235.92 on the 14th, and retained $2,000 without withdrawing. The withdrawal amount was delayed until the 21st, and no transactions were made during the period, but the account records were tampered with to a loss. Another account received 4,158.87 U.S. dollars on the 17th, but it has not been received, and no transactions have been made during the period. The account records have also been tampered with to a loss. Transactions occurred on the above two accounts, and the platform suddenly became abnormal and unable to log in. Later, a transaction loss was recorded in the background account.