great grandfather is Chinese I want to know my ancestors

Hi! My name is Camila. My great grandfather was from China. His name is Kao Len and his last name is Chang. He lived in Guangzhou, jianmeng, xinhui. And his mother was named Tai Po. But he emigrated illegally inside a boat to Guatemala when he was 30 years old and I would like to know if I have family in China. I would appreciate it a lot if someone can help me. My email is camhercha@gmail.com Thank you, hope you have a nice day.