According to Luo Cheng's Preface to Roche Genealogy, the Zhu Rong market in the northeast of Xinzheng County is the site of Roche's ancestors. China's Roche, from the blood of the Yellow Emperor, is a descendant of Zhu Rong. Roche's ancestors were: Xuanyuan Huangdi, Changyi, Zhuan Xu, Li and Kuang, and they came down in one continuous line from now on.
The real name of the ancestors of Roche originated from the 67th ancestor Kuang Gong Zheng. According to genealogical records, Kuang was made a vassal of Luo Di for helping to cut Zhou. Lodi is 80 miles south of Nanzhang County. Because there is a local river called Luoshui, it is called "Luo". Since then, descendants have taken Luo as their nature, which is different from other descendants of Zhurong.