According to Huobi's official announcement, XMR will upgrade the mainnet at a block height of 1978433 (estimated November 30, 2019). Huobi Global will suspend XMR deposit and withdrawal services at 18:00 on November 28, 2019. It will be restored as soon as the mainnet upgrade is completed. The specific time will be notified by announcement. After this upgrade, the XMR deposit and withdrawal address format will change. The old format deposit and withdrawal addresses and address labels will no longer be used.