Identification of ancient paintings of this subject, a lot of people all need to know. First, the museum and the library staff. Because the ancient works of calligraphy and painting, museum and library collections of the rich, and also to cultural relics unearthed and handed down from ancient times as much as possible to collect, protect, to serve the community. If the museum and library staff do not understand the encounter of ancient calligraphy and painting, calligraphy and painting appraisal, its authenticity, quality does not distinguish it with the chaos, Liao Yu, fish, to make treasure into the waste paper, but feel pity; and can not provide reliable information and convenient for painting and calligraphy lovers and art workers, three light and not hide identification, and blind color discrimination, tone deaf, was laughed at those who have knowledge. Such museums and libraries will not be able to protect the cultural relics, the use of cultural relics to serve the community.

　　其次是文史研究工作者。历代流传下的书画作品中，有许多直接反映了现实生活，为研究历代社会生活和文物典章制度，是珍贵的生动形象的历史资料。如：上海博物馆收藏的“内清质以昭明”的透光铜镜，是西汉中晚期物品，光线照射镜面时，纹饰相应，将铜镜正背面的花纹清晰地反映到对面墙壁上。这种精工绝艺和包含着的科学原理，令人惊叹不已。同时汉代的画像石和画像砖，发现近千处，除描写死者的生平事略外，题材内容十分广泛。有古代的神话和历史故事，如伏羲、女娲、神农、古圣先贤、孝子和贞节妇女的故事；有雷公、雨师、风伯、北斗、织女，以及楼台亭阁、舟车人马等。武氏祠里就有的“荆轲刺秦王”、“穆王见王母”、“咬赵盾”等故事画。四川成都发现的画像砖有“弋射”、“收获”，描写了水边射雁和割稻的情景；“市井”描写了盐的生产过程，等等。但是，要利用这些资料，就必须别伪求真。否则，所凭藉的资料若属虚伪，则研究出来的结果当然也随之而虚伪，其研究的工作便算白费了。

　　The second is the study of literature and history workers. The spread of the works of calligraphy and painting, there are many directly reflects the reality of life, for the study of history of social life and cultural institutions, is a vivid image of precious historical data. Such as: Shanghai Museum collection "in the clear matter to light mirror, West Hanzhoung Zhao Ming" is advanced goods, light mirror, the mirror is on the back of the corresponding patterns, patterns clearly reflect to the opposite wall. This includes science and Seiko Jueyi principle, it is amazing. At the same time, the Han Dynasty stone and brick, found that nearly a thousand, in addition to describing the life biographical sketch, the theme is very extensive. There are ancient myths and historical stories, such as Fu Xi, Nu Wa, Shen Nong, ancient sages, dutiful and chastity woman; there is thunder, rain division, wind, Beidou, Vega, and pavilion, zhouche troops etc. The temple is the famous "Jing Ke Assassin", "King Mu see Queen", "dog bites Zhao shield" story. Sichuan Chengdu found a brick "Yi shoot", "harvest", describes the waterside shoot geese and cut rice scene; "the marketplace" describes the production process of salt, etc. However, to take advantage of this information, we must first do not false truth. Otherwise, by virtue of data if it is false, then the research results of course also false, its research work will be in vain.

　　收藏家若不懂字画的鉴别，则会花大价钱买赝品。掠贩家若不知晓字画的鉴别，则不知谁贵谁赚，就达不到唯利是图的目的。所以大家要慎重！

　　If we do not understand and identify collectors, will spend big price to buy a fake. If traders know Home differential grazing pictures, do not know who you who earn, it is not up to the purpose of mercenary. So we should be careful!