By 2022, how many important highways will there be in Gaochun District?

List of key industrial projects in 2022 in Gaochun District, Nanjing City, Jiangsu Province, Including: Jiangsu Suju building unit curtain wall and high-end energy-saving doors and windows manufacturing project, Nanjing fully controlled aviation VR virtual simulation equipment production project, Nanjing Baiduobang thermal insulation and energy-saving materials production project, Nanjing Angao real estate blue-collar apartment, gaochun old street resort hotel, Gaochun Live e-commerce technology industrial park, Youzishan TCM rehabilitation resort base, Wujiazui rehabilitation center, international slow city resort hotel Gaochun national modern agricultural industrial park industrialization development project, including Nanjing Jiayuan new species research and development and original ecological clean vegetables all in industry consolidation, Nanjing University of Science and Technology Zijin College Gaochun.

The first-class highway is a type of highway grade in China, which is located behind expressway and before the second-class highway, and is widely used in trunk line construction. Before the 1980s, the first-class highway ranked first in the early highway grades in China. After the introduction of expressway into China, in order to avoid the troubles caused by the great changes in the old highway hierarchy and highlight the highway names specially designed for high-speed driving, the transportation department directly added expressway to the ranks of traditional highway grades, which was located before the first-class highway and became the new highest-class highway type, while the first-class highway relegated to the second place.