Introduction to Tianmen: Tianmen, a direct member of the Hubei Province, an important member of the Wuhan City Circle, the birthplace of the world tea culture, the hometown of the tea saint Lu Yu. Tianmen was called Jingling, and was named "Tianmen" because of Tianmen Mountain in the northwest. Tianmen is on the bank of the Han River, in the beautiful and rich Jianghan Plain in central Hubei Province, north of Dahong Mountain, south of Hanshui, and 90 kilometers away from Wuhan. Tianmen is the Shanghai-Hanrong high-speed railway passing through the city. It can be directly connected to the whole country by high-speed rail. The territory, the total registered population, the urban population, the built-up area, the water coverage rate and the green coverage rate rank first in the Jianghan area. Tianmen is one of the most populous county-level cities in China, the most populous county and city in Hubei Province, and the largest hometown of overseas Chinese in China. It is known as the “three rural treasures” of cotton township, overseas Chinese hometown and cultural township. According to incomplete statistics, there are currently more than 300,000 overseas Chinese living in Tianmen, 44 countries and regions overseas. Tianmen is an environmentally friendly modern water garden city. It is the county-level city with the strongest medical strength in Central China, and one of the most developed areas in Hubei Province for education, commerce, culture, transportation, exhibition, and logistics. It is one of the top 100 national transportation hubs in Wuhan and the largest cotton spot, warehousing and logistics center in central China [10]. In October 2014, Tianmen City was awarded the title of “2014 China's Most Ecologically Competitive City” [11] and became the only city in Hubei Province to receive this honor.