Well, you'd better find Western Union in Mexico, because the remittance business of Western Union is Western Union remittance, and the people of Western Union will tell you what to do. I guess, at most, you will be asked to bring your certificate, fill out the form and pay the handling fee. As for your family in China, as long as he (she) gets the receipt of Western Union, as long as he (she) brings his/her own identity documents (such as ID card, soldier's card, military officer's card, etc. ) and go to the nearest postal card deposit or agricultural bank to go through the relevant procedures. By the way, Western Union's remittances are all in US dollars. It is stipulated by the China Foreign Exchange Bureau that the annual settlement of foreign exchange by individual China residents shall not exceed US$ 50,000 (or equivalent in other foreign currencies); No more than five thousand dollars (or equivalent in other foreign currencies) at a time. All right, that's it. I hope you don't remit too much at a time, hehe ~ ~ ~