Interesting development regarding visas for Vietnam nationals:
Training Visas Now Available for Nationals of Vietnam
The Hong Kong Immigration Department ("HKID") recently changed its practice regarding Vietnam nationals' entry to Hong Kong for training. Until this recent change, applications by nationals of Vietnam for training in Hong Kong would not be entertained. Effective 14 November 2016, nationals of Vietnam may be granted a visa to enter Hong Kong for training. The eligibility criteria, application procedure and processing time for nationals of Vietnam are the same as any other foreign nationals.