It is pointed out that the agricultural farming methods in Tang Dynasty have made great progress compared with those in Han Dynasty.

The performance of agricultural progress: building water conservancy: ① harnessing the Yellow River: In the Western Han Dynasty, Emperor Wu of the Han Dynasty ordered the harnessing of the Yellow River; In the Eastern Han Dynasty, Ming Di sent Wang Jing to preside over the river repair. (2) Dig a drain. 2. Progress of farm tools: In the Western Han Dynasty, there appeared the farming methods of plowing the wall (turning over the soil and breaking the soil), plowing the cart (sowing tools) and two cows carrying the poles. 3. Crop planting: northern wheat; Southern rice; Middle and lower reaches of the Yellow River: Mulberry trees are widely planted. Handicraft industry: silk weaving industry: using jacquard machine; The dyeing technology is also very high, and silk is liked by foreigners. Smelting technology: Du invented drainage (iron processing tool) in the Eastern Han Dynasty, which was used for blast ironmaking; Function: save manpower and improve smelting quality. Current situation: more than 0/000 years earlier than Europe. Iron weapons replaced bronze weapons in Han Dynasty. Economic measures to strengthen centralization: Emperor Wu of the Han Dynasty brought the right to coin and the right to operate salt and iron into the central government, unified the casting of five baht, and implemented the policy of restraining business. Role of (economic unification): It restrained the profiteering of big businessmen, greatly increased the revenue of the central government, and realized economic unification.