Jianxin Tianyi really needs to pay a handling fee for the transaction of selling 6,543,800 yuan. According to the provisions of Jianxin Tianyi Fund, the transaction fee is charged at two ten thousandths of the transaction amount. The handling fee for selling RMB 6,543,800+is 2 yuan. This is based on a fixed ratio, which is a common practice, covering the operation and management costs of the fund and ensuring fair and sustainable development.