不久前，美国名校斯坦福大学斥资购入爱如生中国类书库初集。至此，斯坦福大学拥有的爱如生数字产品已达到5库6集，即中国基本古籍库、中国方志库初集二集、中国俗文库、中国类书库和晚清民国大报库，成为仅次于哈佛大学和芝加哥大学的全美又一大客户。

在爱如生诸多数据库中，类书库是最值得购买和使用的。因为类书乃“博览群书，分类纂辑”而成，其最大特点是资料丰富，信息量巨大。以爱如生中国类书库初集而论，所收300部历代类书，既有过万卷的古今图书集成，也有数百卷和过千卷的唐宋四大类书、清代四大类书，还有文化遗珍永乐大典和稀世秘笈明代日用类书，这些如果只有纸本书，那么动辄几十册、几百册甚至上千册，是很难搜检的。而类书库提供的检索平台，一按键就得到数百万、数千万条结果，可谓竭泽而渔，研究者再也无须望洋浩叹。希望学术界能尽早了解类书库的价值，让类书库为学术研究助一臂之力。

Stanford University Purchased Database of China Ancient Encyclopedia I

Not long ago, Stanford University, a famous university in the United States, purchased the Database of China Ancient Encyclopedia I. So far, Stanford University has 5 databases and 6 collections of Erudition’s digital products, including Database of Chinese Classics Ancient Books, Database of Chinese Local Records I and II, Database of Chinese Popular Literature, Database of Chinese Historical Newspaper (1872-1949). It has become another major customer in the United States after Harvard University and the University of Chicago.

Among all the databases in Erudition, Database of China Ancient Encyclopedia is the most valuable one to purchase and use. Because encyclopedia is made up of "extensive reading, classification and compilation", their greatest characteristics are abundant resources and huge amount of information. In terms of Database of China Ancient Encyclopedia I, the collection of 300 kinds of encyclopedias of past dynasties includes not only the collection of ten thousand volumes of the Ancient and Modern Book Collection, but also the four encyclopedias of Tang and Song Dynasty, the four encyclopedias of Qing Dynasty, Yongle Daian of Cultural Heritage and encyclopedia of daily use of Ming Dynasty. Hundreds or even thousands of copies are very difficult to search. The search platform provided by the Database of China Ancient Encyclopedia can get millions and tens of millions of results at the touch of a button, which can be regarded as a complete resource pool. It is of high value to researchers. It is hoped that the academic circles can understand the value of Database of China Ancient Encyclopedia as soon as possible, so that the database can further promote academic research.