hi!my friend invite me to go to china,he is a mexican but have residency in china,

He can be your sponsor by writing an invitation letter stating that he will afford your trip to China. He also need to provide you copies of his passport and Chinese residence permit as assistance for your China visa application.

After you submit the visa application to the embassy, you will be given a pick-up receipt on which there will be the date for you to collecting the visa. On the appointed date, you can call the embassy first to know whether your visa is issued or rejected.