Enter the cardholder’s phone number and remember to enter the country code 86.

A country code (or country code) is a set of geographical codes used to represent countries and overseas territories. Country codes are short strings of letters or numbers that facilitate data processing and communications. There are many different country code standards in the world, the most widely known of which is ISO 3166-1 from the International Organization for Standardization. The country code may also refer to the country code for international long distance calls, which is the International Telecommunications Union's international calling code (E.164).