About China Post
China Post, full name China Post Group Company, is the state-owned enterprise operating the official postal service of China, which provides the service in mainland China, excluding its special administrative regions, Hong Kong and Macau, which have their own postal service independent to the mainland's.
China Post Tracking number Instructions:
The most common tracking number format is a combination of 13 alphabetic and numeric characters, usually starting with 2 alphabets, following by 9 digits, and ending by "CN" (e.g. RA999999999CN).