Hunan Tongguan Kiln porcelain is valuable. Hunan Tongguan Kiln porcelain is one of the traditional famous kilns in China, which has high historical and artistic value, so its value in the market is also relatively high. Hunan Tongguan Kiln, which started in the early Tang Dynasty, flourished in the middle and late Tang Dynasty and declined in the Five Dynasties, has experienced more than 200 years before and after, with a history of 1000 years. It is one of the three export-oriented porcelain kilns in China in the Tang Dynasty, which is as famous as Yueyao in Zhejiang and Yao Xing in Hebei. It is also the birthplace of colorful underglaze ceramics in the world.