Our school has done this infrequently for teachers over the past several years, including quite recently.

The medical must be done in Bangkok at a facility that is approved by the Chinese Embassy. The Embassy in Bangkok can provide you with a list of approved clinics.

It is the same process as elsewhere in the world -- one day service, three day service, five day service, all at varying degrees of cost.

You must be sure, however, that your letter of invitation for the visa specifically reads : "Bangkok, Thailand" (or at the Embassy of the PRC in Bangkok, Thailand). If the letter of invitation does not carrying these specific words, the Embassy will not issue the visa.