How to send short messages from the United States to China?

Just add 0 1 186 before China's mobile phone number.

0 1 1 is an international call prefix in the United States, which tells the system that the information is sent from the United States.

86 is the country code of China.

Country code (or country code) is a set of geographical codes used to represent countries and overseas territories. The country code is a series of short letters or numbers, which is convenient for data processing and communication. There are many different national code standards in the world, among which ISO3 166- 1 is the most widely known. The country code can also refer to the country code of international long-distance calls, that is, the international telephone area code of the International Telecommunication Union.