Biki Exchange is about to close down due to policy changes, in China I assume.

You can read more details from their announcement about it from about a week ago, but in short you should start withdrawing all your funds out from there before it is too late, but in practice you have until the end of November to do so.

Biki will start delisting trading pairs, planning on having all trading ceased at end of this month.

During November you can only withdraw, nothing else.

In case you fail to withdraw by end of November, you can get your cryptos back even after that, but Biki is going to be charging a 10 percent annual fee for safekeeping your cryptos, which makes the question of what if you just decide to forget about your coins, will you 11 years later need to pay them the amount of 10 percent annually?

Just to be on the safe side, better withdraw.