Because Wang Ling and his wife were the first to develop the Yellow River Pure Inkstone, which had been lost since the Yuan Dynasty, they were awarded the "Yellow River Pure Inkstone Invention Patent" by the National Patent Office; and in 1999, they produced the Macao Return Diameter The 1.99-meter "Nine Dragon Sundial" celebration mud inkstone won the gold medal of the "Mountain Flower Award", the highest award in China's folk crafts community. The Chengni inkstones made by Wang Ling have been collected by many domestic cultural relics institutions such as the National Museum and Henan Museum. They have been invited to travel abroad for exhibitions and exchanges many times. The inkstones have been collected by many countries such as Australia, South Korea and Singapore. Because of the high quality and limited quantity of his works, the price is correspondingly high. Due to the complexity of the production process, the normal price is between 500 yuan and 20,000 yuan. There is a large dragon with a good kiln in the exhibition hall of its research institute. The price of the inkstone is 160,000 yuan, which gives an idea of ??the price of his works.