Can I shop with the ticket of the National Ocean Museum?

I can't. According to official website of the National Ocean Museum, the National Ocean Museum is a public welfare museum, and the visiting ticket only includes the right to visit exhibitions and exhibits, excluding the shopping privilege, so the visiting ticket cannot be used for shopping. The National Ocean Museum is located at No.368, Haixuan Road, Sino-Singapore Eco-city, Binhai New Area, Tianjin. It is the first and only national comprehensive ocean museum in China, with many ocean exhibition halls and exhibits. Visitors can appreciate and understand marine history and culture, marine science and technology and ecological environment.