The placement of Guobo calendar is very well studied. If it is not well placed, it will cause damage to the book. It must be placed with a book stand to guarantee the sense of the times.
Guobo Calendar is a book published on September 15th, 218. The author is the Cultural Industry Development Center of Guobo (Beijing) and Zhiyuan Wenchuang. The National Museum of China is the highest historical, cultural and artistic hall in China, with a collection of more than 1.4 million pieces, which fully shows and witnesses the blood of Chinese civilization for 5, years.