Bonjour, Il semble que personne ne sache réellement le sens des initiales.

Voila globalement la meilleure réponse que l'on trouve :

"

There are many codes seen, because of many mail pieces to be sent in that country having a huge population.

No further info is found unfortunately. Those are issued by the China Postal Administration.

Known initials: RJ, RF, RB, RD, RG, RH, RI, RK, RM

"

Ils peuvent tous être suivis via China Post Tracking.

http://www.17track.net/

Salutations.