Does Dalian Sino-Hong Kong Customs Declaration Vocational and Technical School belong to a vocational high school?

Don't belong. Dalian China-Hong Kong Customs Clearance Vocational and Technical School is a junior college, so it is not a vocational high school. Dalian, also known as Bincheng and Romantic City, is a prefecture-level city, a sub-provincial city, a city with separate plans and a mega-city under the jurisdiction of Liaoning Province. It is an important central city, port and scenic tourist city in the northern coastal area of China and a central city in the coastal economic belt of Liaoning.