No, it isn't wrong.
EMS is an International Cooperative. China is a member and the carrier used there is China Post. The US is a member and the carrier we use is USPS. The UK is a member and the carrier they use is Parcel Force.
they are still entirely different postal services (companies/orgaizations) tho.. the fact they cooperate with each dosnt make them the same..
but we are talking definitions.. by yours most of the worlds postal services could be considered the same.. Royal Mail international airmail in the UK swaps over to USPS in the US and god knows who in the forty odd countries we have shipped to..
but i wouldnt say Royal Mail is Royal Mail in any country in the world and Royal mail certainly aint USPS just like EMS isnt USPS..
mind you in the sense they all deliver mail they are all the same.. i am waiting for a couple of parcels to arrive today from china.. for some odd reason they have used USP not EMS.. unusual but they must have their reasons.. USP seem to handle the entire China to UK journey no swap overs with them..
quite why someone in China would use USP to ship to the UK is a wee bit odd to be but who knows.. he he..
trog