No, Qingdao, also known as Island City, Qingdao and Jiaoao, is a prefecture-level city, a sub-provincial city, a city with separate plans and a megacity under the jurisdiction of Shandong Province, China. The eighth unit of the first volume of the third grade of primary school mathematics in Qingdao Edition is "a preliminary understanding of fractions", not just learning integers. Integer is the most basic mathematical tool that human beings can master. In the integer system, zero and positive integers are collectively called natural numbers.