How thick a quilt does Xi An cover in winter?

4 to 6 Jin quilt. Xi 'an, referred to as "pickaxe", was called Chang 'an and Haojing in ancient times. It is a prefecture-level city under the jurisdiction of Shaanxi Province. It is the capital of Shaanxi Province and an important central city in western China approved by the State Council. With a total area of 10752 square kilometers, it is an important national scientific research, education and industrial base. In Xi 'an, the weather changes greatly in winter, and the temperature drops suddenly. The temperature is 0 degrees. It is enough to take 4 to 6 kilograms of quilts to Xi 'an to go to school.