Ah Lai's father was the leader of a horse gang under the last Tusi of the Tibetan people, and he wrote the novel The Dust Has Settled after obtaining a wealth of authentic material from his father's generation.

The tusi system is a form of local power organization and system set up by the Yuan, Ming, and Qing dynasties in ethnic minority areas, and the tusi, also known as tuji, were local officials appointed and appointed by the central dynasties in ancient China, and the tusi, also known as tuji, were local officials appointed by the central dynasties in ancient China, and the tusi, also known as tuji, were local officials appointed by the central dynasties in ancient China. "The important features of the system are the hereditary political rule, the hereditary ownership of the land under the jurisdiction and the hereditary rule over the peasants attached to the land.