CHINA VISA APPLICATION WITH TRAVEL DOCUMENT

I AM AMERICA TRAVEL DOCUMENT HOLDER WHICH AS A LIEU OF PASSPORT NOT A PASSPORT WITH A PERMANENT RESIDENT ALIEN CARD, CAN I GET CHINA VISA IN HO CHI MINH CITY OR I HAVE TO GET CHINA VISA FROM AMERICA. BUT I WILL BE TOUR CHINA FROM VIETNAM

HELP HELP

THANKS A MILLION