What is the best copybook written by Gu Zhongan?

Gu Zhongan was a famous calligrapher in Ming Dynasty in China, and his calligraphy works were praised as "the best running script in the world". He has a lot of copybooks, the most famous of which are "The Ritual Spring Inscription of Jiucheng Palace" and "A Manuscript for Sacrificing a Nephew".

The inscription of Jiuchenggong Liquan is an inscription written by Gu Zhongan in Jiajing period of Ming Dynasty, which mainly introduces the history and legend of Jiuchenggong Liquan. This inscription is not only rich in content, but also neat and dignified, and is regarded as one of the masterpieces of Gu Zhongan's calligraphy art.

The Manuscript for Sacrificing Nephew is a memorial to the deceased nephew written by Gu Zhongan in Wanli period of Ming Dynasty. This eulogy contains many touching words and grief, and the font is very smooth and natural. It is considered as one of the most infectious and artistic works of Gu Zhongan in his later years.