What are the main differences between Old Town of Lijiang and Dali ancient city?

In the 500-year history of Tang and Song Dynasties, the ancient city of Dali was the political, economic and cultural center of Yunnan. There are four key cultural relics protection units 14 in the ancient city, which bear the historical culture, religious culture and national culture of Dali and are the core tourist areas of Dali. There are four gates and four turrets in the ancient city of Fiona Fang. There are four gates around the city wall, namely Erhai Gate (also called Tonghaimen) in the east, Shuanghemen (also called Chengen Gate) in the south, Cangshan Gate in the west and Santanmen (also called Anyuan Gate) in the north. There is a moat outside the city. It was rebuilt many times in the Qing Dynasty, and the city maintained a typical chessboard structure, with symmetrical north and south gates and criss-crossing streets, which was called "Nine Streets and Eighteen Alleys". As one of the inhabited areas of ethnic minorities, Dali ancient city is rich in Bai cultural resources and a place where multi-ethnic cultures blend and develop. Central Plains culture, foreign culture and local culture collided and exchanged here, forming a splendid Nanzhao Dali culture and a distinctive Bai culture.