Looks like you're from China, had you tried Houbi? It's 3rd largest biggest exchange in China yet they offer 1.5% fee via OkPay and 1% if you do international wire transfer. You can try this if kyc is not a big deal for you since they require identity verification.

On the other hand, there's also Bitfinex with insanely 0.1% fee via wire transfer. However, I won't recommend this as it was recently hacked and the funds are still not fully compensate to its user. Try this at your own risk.