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 Post registered surface mail. Normally it is much slower than airmail and might take up to 6 months to arrive.
format 3: the number starts with “E” and ends with “CN”, i.e. EE123456789CN, EA987654321CN
This is China Post Express Post Service(EMS). Normally it is much faster than airmail and might take one to four weeks to arrive. The price is also much higher than airmail.
format 4: the number starts with “L” and ends with “CN”, i.e. LK123456789CN, LN987654321CN,LM123456789CN,
This is China Post ePacket parcel. It is almost as faster as EMS and only a little bit more expensive than airmail.
However, ePacket service is only available to limited countries such as USA, Canada, Australia,UK etc.
All above tracking numbers can be tracked in http://track-chinapost.com
Besides these four forms trackable service, China Post also provide a parcel service called regular airmail which can NOT be tracked in China Post database.. Regular airmail has no tracking number. Thus,sender can not verify if receiver has got the parcel or not, and receiver can not verify if send really shipped the parcel either.
Regular Airmail is much cheaper than Registered Airmail especially for light weight item because it saves a lot of data entry labor. The arrival speed is similar to REGISTERED AIRMAIL.
Since many big marketplaces such as ebay, aliexpress, amazon etc REQUIRE seller to ship goods with tracking number. Some China Post agents also provide some kind of mock “tracking number” for China Post Regular Airmail in order to fulfill the marketplace requirement.
Such kinds of mock “tracking numbers” have different forms, i.e CP1233456789, YW123456789YW,YC123456789YW, 123456789BJ,RI123456789EN,WD123456789CN …. Sometimes, those tracking number can shows some parcel pickup info and airport info in the agent’s own website. In most cases, the parcels from big agent such as Yanwen will arrive destination without any problem. However, these tracking number have nothing to do with China Post and China Post can not verify the authentic of the parcel shipment.
If you got such number over 30 days and can not receive the goods, you should open dispute to your seller.