With the growing emphasis on photographic art, the emergence of new creation, the ancestors of the works of photographers and their names have been found. Now, we have known about many outstanding photographers who live before or after the founding of New China, Most of those people are accompanied by red tide and the revolutionary era record images. Also, We much familiar with photographers during the period of the late Qing density and famous folk photo studios.

However, From 1927 that the Northern Expeditionary Army entered Nanjing to 1949 that the new China is formed, during more than 20 years ,which the image creation, in addition to general familiar with the Lang Jingshan, Wang Xiaoting, and other works predecessors, we still feel very strange. In fact, during this period of history have taken place in many of the major events, there are many meaningful social change. At present the general view of this period of photographic works are mostly old copy of the magazine, show the original photographic quality, this is far from sufficient. We need to find out that the film, re-prints, to confirm the author's identity and background information, to give due respect for the original author.