What happened when Jiang Jieshi takes over the Guomindang after Sun Yixian dies?

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?

During the 1960s, the government of modern egypt built the aswan high dam to store water for drinking and irrigation, control flooding, and generate hydroelectric power.

Provincial cuisine is characterized by elaborate preparations, fancy garnishes and rich sauces. true false