What ancient roads {} economic development did the ancient commercial roads promote?

The ancient ways for ancient businessmen to promote economic development are as follows:

1. The ancient tea-horse road refers to the folk international trade passage that exists in the southwest of China and takes caravans as the main means of transportation. It is a corridor for ethnic economic and cultural exchanges in southwest China. The ancient tea-horse road is divided into Sichuan-Tibet line and Yunnan-Tibet line. The ancient tea-horse road originated from the tea-horse trade in the ancient southwest frontier;

2. Nanhuang Ancient Road, also known as Huangnan Ancient Road, is located at the junction of Linhai City and Tiantai County, Zhejiang Province, starting from Qianyang Village, Nanping Township, Tiantai, and ending at Dafan Village, Huangtan, Linhai, with a length of about 12 km. The Nanhuang Ancient Road was built 1 0,000 years ago, and it is an ancient commercial road.

3. Huizhou-Hangzhou Ancient Road, located in Fuling Town, Jixi County, Anhui Province, was founded in the Tang Dynasty and has a history of 1000 years. It is the third famous ancient road in China after the Silk Road and the Tea-Horse Road. It has played a great role in politics, economy and culture in history, and it is a corridor of natural scenery and mysterious culture.