Where are Dushan and Sandu economically developed?

Hello, I'm from Dushan. Dushan has developed rapidly in recent years. This year, it has just been promoted to Guizhou Economic Development Zone. Its economic strength is relatively ahead of the surrounding counties and develops rapidly. The traffic is very convenient. There are highways, railways, 2 10 national highways and provincial highways leading to Libo. The square in front of the railway station is the largest and most luxurious in Guizhou, and the 60-meter development avenue is relatively spacious. Urban planning is scientific, and traffic is not congested. The weather in Guiyang, the provincial capital, is relatively cool, which is very suitable for people to live in. Needless to say, there are three national parks with many beautiful tourist resources. It takes two hours to reach the seven arches in Libo. Dushan county, formerly known as Qiannan Prefecture, was really famous before the Anti-Japanese War. It is called little shanghai, the first airport in Guizhou and the fourth branch of Huangpu Military Academy. Before that, the city had a population of1.2000, but now it has only 34000 people, but it was occupied by the Japanese army and burned for seven days and seven nights, becoming the last place occupied by the Japanese army. . . . Known as "Lugou Bridge in the north and Shenhe Bridge in the south" (Shenhe Bridge is in Dushan), a TV series "Bloody Dushan" is being filmed in this background. Welcome to learn about education. Dushan is building a university town, the Central Conservatory of Music (2 1 1 project), the Mobile Mediterranean University (English teaching, Sino-foreign cooperation) and the International University of Northern Cyprus (the University of Northern Cyprus). . . . Dushan National Middle School developed rapidly and became famous gradually. Shanghai and Duyun will become a bigger city, or they may become an independent prefecture-level city in four or five years. I hope I can help you!