Mr.S A Kuchai, maybe you can't get China visa in Hong Kong, now the China visa regulation asks applicants who want to apply for China visa in a third country/region should hold the valid residence permit or other certificate which entitles them to reside for at least 6 months, I know that we Uk citizens don't need a visa to Hong Kong for up to 180 days, but the visa officer in Hong Kong maybe will ask us to provide the Hk Id card, if you have it, you can get the China visa in Hk.