2. Introduction to this calligraphy work:
Jiuchenggong Liquan inscription, Tang Dynasty inscription. It was carved in Linyou (now Shaanxi) in 632 AD. Wei Zhi wrote, Ou Yangxun wrote. Describe that Emperor Taizong discovered Liquan during his summer vacation in Jiucheng Palace.
3. Explain in detail:
Ou Yangxun wrote this inscription at the age of 76. His calligraphy art is perfect, and it is also a masterpiece of calligraphers. Since ancient times, this inscription has been praised as "the ultimate principle of regular script" and is deeply loved by people.