According to TechFlame, according to official sources, Coinbase will carry out maintenance on August 19 at 8 a.m. Beijing time. There will be delays in sending and receiving BTC, LTC, BCH, ZEC, and DASH during the maintenance period. Sending and receiving of all ERC20 tokens and the Ethereum (ETH) and Ethereum Classic (ETC) networks will also be delayed, and transactions will not be affected.