1. People in the Tang Dynasty were called Chinatown or China, and people lived in urban areas of other countries. Chinatown came into being because early Chinese emigrated overseas and became local minorities. Facing the new environment, they need to help each other in the same boat, so most Chinatown is a witness to the history of overseas Chinese.

2. Chinatown in San Francisco, USA is the originator of the San Francisco municipal government: 1846, the American warship Doctor Cat landed in the corner of the present Chinatown Garden and raised the first American flag. At that time, San Francisco was also known as Yebabuna YerbaBurna. Six months later, the city government of San Francisco was formally established, and Yebabuna was renamed as San Francisco. But before the establishment of the municipal government, China people had already thrived in Chinatown. The first Chinese to start a business in the United States was Cantonese. 1807, Guangdong businessmen arrived in the United States and sold China's silk, ceramics, seafood, tobacco and other products to the United States. Surprisingly, China people had this idea 200 years ago, which indicated that China people took the first step to the American continent. The development and glory of San Francisco are closely related to the people of China.