When Meng Yingrui was 32 years old (A.D. 172 1), in the 60th year of Kangxi, General Man Han and Governor of Sichuan and Shaanxi jointly wrote to the imperial court and Emperor Kangxi: "Meng Yingrui's contribution to the Western Expedition and his ancestor Meng's ancestral home was the Meng family of Jiaolongbao in Jingyang County (now Sanyuan County), Xianyang City, Shaanxi Province, and his distant ancestor was the famous Qin Meng Yi. Meng Yi is the younger brother of Meng Tian, the father of Meng Yi, and the fathers of Meng Tian, Wu Meng and Meng Ao are all famous military commanders in the Qin Dynasty. Meng Shi III is a symbol of the great cause of China's reunification and a model of civil servants and military commanders in past dynasties. Meng Yingrui's ancestor Meng once escorted Meng Yingrui's father Meng from Jiaolongbao to Langzhong, Sichuan. He made a living by running the bean curd industry, and under quite difficult circumstances, he trained rare military talents for the Qing Dynasty. It is the blessing of the Qing Dynasty, the blessing of the army and the people, and the blessing of Montessori. Emperor Kangxi, according to the ensemble and Langzhong City, Baoning House and Chuanbei Town, there were many wasteland and few people at that time. Meng Yingrui was promoted to be a military commander (general), and he was rewarded with red coral and three-eyed peacock flowers, guarding the important town in Hunan. However, due to his considerable prowess, resourcefulness and lack of experience in guarding the home, he must arrange for his family to go to various parts of China for experience before he can be competent. At the same time, the imperial court and Emperor Kangxi awarded Meng Yingrui's ancestor Meng, Meng Yingrui's grandfather Meng and peacock feathers with red coral eyes to the generals. Enjoy the treatment of the governor (equivalent to today's "lieutenant general rank"). Meng Yingrui's ancestor Meng is about 86 years old and Meng Yingrui's ancestor Meng is 63 years old. The imperial court and Emperor Kangxi granted the Montessori family the freedom to choose wasteland around the fief for development and construction in order to build "houses, ancestral temples, vegetable cultivation and leisure outings". Emperor Kangxi presented Meng Yingrui with a satin, silver and gold-plated imperial pen "Yuan Rongdi". It means that Meng Jiajun immigrated from Jiaolongbao, Shaanxi Province to the first residence of Baoningfu (Langzhong) in northern Sichuan Town. Meng, the general of Xiaoqi, and Meng, his father and son, continue to train Meng's descendants to study hard and make contributions to the country. Reclamation and development of imperial wasteland ... Three generations of Montessori family will receive the imperial edict and the "Yuanrongdi" gold-plated house number together with Langzhong officials and people in Langzhong North Gate Well. Therefore, Beimen Well is also called Zhenwu Well. In the autumn of A.D. 172 1, the government started construction, which was personally supervised by General Meng Yuanheng, and was completed in the second year of Yongzheng with the strong cooperation of soldiers from northern Sichuan. The original site of Mengfu, the "Yuanrongdi", is located in the northwest of Langzhong City, a famous historical and cultural city in northern Sichuan, and there is a gap above the elevation at the junction of Building 2 and Building 4 of Ying 'en Street (No.64, Houjiefang Road, A.D. 1949, Ying 'en Street 18, A.D.). Later, in order to welcome the emperor's kindness. Deeply loved by the people, it was named Ying 'en Street. Therefore, after three generations of Meng Yingrui's famous grandchildren sealed the generals in the same place at the same time, Emperor Kangxi granted the Meng Yingrui family a fief for four historical reasons, which gave them the names of Guancaiyuan Street and Mengjiawan in Shuanglong Town today.