Why do so many Mexicans sneak into the United States?

Mexicans specialize in catching illegal immigrants from abroad. They turn a blind eye to their own country and let their own people go back and forth without catching them. They also published a book for their country, "China People's Survival Manual", which is to teach China people how to smuggle. There is a sentence written by China in the immigration prison. Longyou played a game of catching shrimp in shallow water, and the tiger fell to Pingchuan and was bullied by the dog. Tomorrow, he flies out by thunder and laughs at the man and woman. Hope to adopt! ! ! ! ! ! !