The Chinese first name in FirstNames_zh is actually Chinese full name. So the format of generated customer name in Chinese is last name + full name

[StephenPeng111]

Take the first item(鏴和誠) in the firstNames_zh as an example. 和誠 is a Chinese first name. 鏴 is a Chinese last name. So 鏴和誠 is a Chinese full name instead of a Chinese first name.