The plant hair dyeing products of Nanjing Tongrentang include green packaging and black packaging, in which the black packaging is the real product of Nanjing Tongrentang, while the green packaging is the branded product of Nanjing Tongrentang.

according to the information of beauty cosmetics in Celmen, Nanjing Tongrentang Green Gold Home turned from green to black, which belongs to the branded products of Nanjing Tongrentang, not the real products of Nanjing Tongrentang. The trademark of "Nanjing Tongrentang Green Gold Home" is the branded trademark of products authorized by Nantong Health, a wholly-owned subsidiary of Nantong Pharmaceutical.

Therefore, the plant hair dyeing products of Nanjing Tongrentang in black package are real Nanjing Tongrentang products, while the products in green package are OEM products.