In which museum is the Preface to the Orchid Pavilion copied by Feng Chengsu?

Preface to Feng Mo Lan Ting, written by Tang and Linyi, is a paper book and a running script, with a length of 24.5 cm and a width of 69.9 cm. Collection of Beijing Palace Museum.

The front paper 13 lines of this volume are loosely spaced, and the back paper 15 lines are tightly spaced. But the front, back, left and right belts are obliquely scattered, and the whole paper is integrated, which is better than other copies. Repeated pitching with a pen, sharp nib, sometimes thief hair, cross-pen, not only retains the traces of copying according to the original trace, but also shows the characteristics of free writing. Copying is natural and vivid, which has the advantage of "preserving truth". It is the most exquisite manuscript handed down from ancient times, which embodies the artistic charm of Wang Xizhi's calligraphy and has a beautiful appearance. It is a copy of the Tang Dynasty close to the original.

This book is made of two sheets of paper, which are smooth and delicate. It is called "Shenlong Ben" because there is a seal script with the year number of Shenlong in Lixian County, Tang Zhongzong. Later, the inscription: "Tang Zhongzong copied the Preface to Lanting Collection by Wang Xizhi, a right general in the Jin Dynasty", which was confirmed as a copy.

A few years ago, it was verified that this statement was wrong, and this version was forged by the Ming Dynasty.