Buy the real questions of vocational college entrance examination in Dangdang and JD.COM Mall, and sell them in Dangdang and JD.COM Mall. Dangdang is the world's largest Chinese online bookstore and shopping center. JD.COM is one of the e-commerce giants, and JD.COM Mall is also rich in books. Vocational college entrance examination refers to the specialized college entrance examination for vocational education, as opposed to the general college entrance examination (the national unified examination for enrollment of ordinary colleges and universities). The Ministry of Education has gradually established a vocational college entrance examination system, making it the main channel for higher vocational examination enrollment.