Founding date: 1644, 1819, 1978/1982 or 2000?
China.com.cn (2024) and Fujian Daily (2022) date the family's tea history to 1644. China.com.cn and Chamen date the 瑞泉 trade name to 1819. Chamen says the works closed in 1949 and were revived in 1978; China.com.cn dates the revival to 1982. Chamen dates the modern company to 2000 (after Huang Shenghui took over in 1999). All of these are family and company accounts. No independent record of the 1819 house was found, and no source for the year 1858 sometimes quoted was found. A registry date for the current legal entity was not confirmed.