测试地址https://testnet.binancefuture.com正常，正常地址https://fapi.binance.com超时

使用测试地址：https://testnet.binancefuture.com能正常调用接口，换成：https://fapi.binance.com总是超时，但使用postman调用https://fapi.binance.com却是正常的，请问是怎么回事？

Start by reproducing the timeout with https://fapi.binance.com through the Java connector and compare it with https://testnet.binancefuture.com and the successful Postman request. The issue names no source file or test, so first locate the connector's endpoint and HTTP request entry points; done means identifying the connector-specific cause and confirming the production endpoint works.

Written by the indexing model from the issue text.