What was the population of the whole country during the Tang Dynasty?

The registered permanent residence in the Tang Dynasty also increased rapidly. During the Wude period, there were 2 million households in China, 3 million households in Zhenguan period, 3.8 million households in Tang Gaozong Yonghui in the third year (652), and 6/kloc-0.50 million households and 37/kloc-0.40 million households in the last year of Wu Zetian (705). In addition, during the Kaiyuan and Tianbao years, the population grew faster. In the 14th year of Tianbao (755), the number of households in China increased to 89 1 10,000, and the population reached 529 1 10,000, which was the highest figure of population statistics in the Tang Dynasty. Because many fugitives are not registered, the number of registered households counted by the government is lower than the actual number. According to estimates, the actual number of households in China during the natural forest protection period was at least130,000 to140,000. If you count a family of five, there are about 60 million to 70 million people in the Tang Dynasty. According to its estimation, the cultivated land area is about 8 million to 8.5 million hectares, slightly higher than the highest cultivated land figure in the Western Han Dynasty.