You almost certainly can't, unless you're Chinese. It's hard to get online accounts like this without already having Chinese identity documents or bank accounts.

However it isn't really anything special in terms of return: https://www.deposits.org/world-deposit-rates.html

A 1-year term deposit in Azerbaijan can get you a 15% return. The problem with looking at just the interest rate is that inflation and the value of the currency can pay a huge factor in how much that interest rate is actually worth.