Chinese seal carving began in the Qin and Han dynasties and has a history of more than 2,000 years. It has experienced the two artistic peaks of the Qin and Han dynasties and the Ming and Qing dynasties, making it increasingly mature. Yu Tongxin, as a representative inheritor of the craftsmanship of making official seals and imperial seals in Changping District, based his seal carving on historical originals, incorporated his own unique style and characteristics into his techniques. Each of his works reflects his decades of calligraphy attainments and the exquisiteness of his carving techniques. He repeatedly compared each seal he created with the original rubbings, revised the draft several times, and finally used the knife, and every knife must not make mistakes to achieve a realistic effect. At present, due to the large size of the imperial seals and official seals, which need to be carved by hand, it is very difficult. Nowadays, there are very few people who carve giant seals like this. Because of this, the collection value of this kind of seals is increasingly discovered, and most collectors, when they cannot get the originals, turn to collect this kind of anti-carving cultural relics, official seals and imperial seals handicrafts with certain artistic and aesthetic value. Yu Tongxin's official seals and imperial seals have been published in various newspapers and magazines over the years. His calligraphy and seal carving works have won awards in national competitions for many times, and have been exhibited in Japan, Hong Kong and other places, receiving wide acclaim. In 2004, CCTV's "Appraising Treasures" program made a special report on his seal collection.