Valuable, according to the Taobao celebrity network query. At present, Niu's calligraphy works are worth about 3900 yuan per square foot. Niu's calligraphy works adhere to tradition instead of sticking to the rules. They combine the brushwork of famous calligraphy posts of past dynasties, and have traditional charm and their own unique artistic style. Their brushwork is vigorous, simple and heavy, and the font structure is rigorous. Deeply loved by collectors and calligraphy lovers, it has great collection value, so it is valuable.