After the accumulation of Kangxi and Yongzheng dynasties, especially Yongzheng, the national strength of the Qing Dynasty reached its peak. In the early Qianlong period, it was precisely because of these accumulations and the efforts of Qianlong that the national fortune was pushed to the peak, but it was followed by arrogance, belligerence, spoil and gentry, and gradually lost all the money accumulated before. His son Jiaqing ascended the throne, and the country inevitably declined.