I just realized that withdraw bitcoin and transfer bitcoin can generate a large fee. It's too expensive.
So people suggesting using LTC to withdraw and transfer.
This is how it works.
First, trade btc to ltc.
Then, withdraw ltc to your other accounts. Usually the fee will be small.
Last, trade ltc back to btc or other cryptocurrency that you like.
Especially, If you use Kucoin and Cryptopia, you can transfer not only using LTC, but also other coins like DeepOnion. The fee for DeepOnion is even cheaper.
If you like this post, please give a like and support so other people can learn.
Thanks to everybody!