Both BihuKEY and SelfKEY are called KEY, and they are all ERC20 tokens, but they are actually different things. The contract address of BihuKEY is
https://etherscan.io/address/0x4cd988afbad37289baaf53c13e98e2bd46aaea8c. The contract address of SelfKEY is
https://etherscan.io/address/0x4cc19356f2d37338b9802aa8e8fc58b0373296e7. Looking at the contract, the abbreviation for BihuKEY is KEY, and SelfKEY is referred to as Erc20 (KEY) for short.
When KuCoin.com listed KEY(Actually it's Erc20(KEY)), I had some KEY hold by imToken, they used the same name, and the icon on imToken was very similar to the icon on KuCoin.com. So the more than 30000 KEYs deposit to KuCoin.com. At present, the KuCoin.com notes do not return the KEYs.
So to remind everyone, even tokens all by Ethernet, even used the same short name, must check the contract before the transfer.