Both Hui and She nationalities have blue surnames.

According to "Admitting Ancestors and Returning to the Ancestors-Searching for the Roots of Hundreds of Surnames in China", the Lan surname of the Hui nationality is "an Islamic surname (from Arabic) borrowed from a China surname with similar pronunciation." Lan Chufang, a poet in the Yuan Dynasty, was originally a "Hui people returning to the west", and adopted the word Lang after entering the customs. Due to the disaster of "Blue Prison" (the murder of Lan Yu and her family) during the Hongwu period of Ming Dynasty, the information of Lan family among Hui people is quite scarce. In historical documents, Lang is often mistaken for Lang. For example, Lan Chufang is "blue" in the history book Taihe Yin Zhengpu; It is the "orchid" in the history book "Ghost Record Continuation"; In the history book "Who's Who in the Western Regions", he said: "Lanchufang, also known as Lanchufang". In the Ming Dynasty, the official data of aquamarine was "blue", while the folk occasionally recorded it as "blue". Like A Lang, it is another surname with the same pronunciation of Hui people, which should not be "blue" or "blue". But because of the disaster of "blue prison", those who turn "blue" into "blue" are another matter.

Lan family of She nationality comes from the legend of creation. Lan Guanghui, the second son of Tiger Pan in ancient times, lived in runan county to protect the country. Lan is the first surname of She nationality, which is widely distributed in mountainous areas of Fujian, Guangdong and Jiangxi. After the Song and Yuan Dynasties, some of them changed their national names to avoid the slaughter of Han people or out of respect for Han culture. This situation lasted for hundreds of years, and it was not until the mid-1980s that the She nationality was completely restored in Langs in Zhangpu, Longhai and Shanghang in Fujian, and in Tai Po and Raoping in Guangdong, with a total population of tens of thousands. And more blue clan people of the same ethnic origin scattered around the world still appear as Han nationality.