Changpeng Zhao said on Twitter that the initial analysis of the hacker attack on Ankr was that the hacker tampered with the contract into a malicious contract due to the theft of the developer's private key. Binance had halted withdrawals hours earlier and frozen $3 million worth of assets transferred to Binance by hackers. In addition, Binance stated on Twitter that it will start maintenance on the BNB Chain at 15:00 Beijing time today, and Binance will also suspend the deposit and withdrawal of BEP-20 tokens on the BNB Chain for about 2 hours.