What are the stand formats of China Post tracking number? How to distinguish them?

China Post tracking number has standard formats as following: format 1: the number starts with “R” and ends with “CN”, i.e. RR123456789CN, RI987654321CN This is China Post registered airmail. Normally it will arrive destination in 2 to 8 weeks. format 2: the number starts with “CP” and ends with “CN”, i.e. CP123456789CN This is China … Continue reading What are the stand formats of China Post tracking number? How to distinguish them?