凯利公式最准确的使用方法简介：Hua Yunfeng, who casually picked up the phone, changed his expression when he heard the gentle and pleasant voice on the phone: Hello, hello, I am Liu Yun, the chairman of Yunshan Group, is this Director Hua?
Hua Yunfeng, who casually picked up the phone, changed his expression when he heard the gentle and pleasant voice on the phone: Hello, hello, I am Liu Yun, the chairman of Yunshan Group, is this Director Hua?
