There are differences between internality and externality in the identification of painting and calligraphy. Internality is the style, artistic conception and brushwork of painting and calligraphy; And externality is like other people's memoirs about this work, traces of existence in history. First of all, as for the internality, the quality of a painting and calligraphy work largely depends on the artistic conception expressed in the work.

“画，形也。”虽然在外行人看来，是否写实和是否能让人看懂是很重要的，这点也没错，但是画更讲究“以形写神”，这在魏晋南北朝的顾恺之提出后就开始引导了绘画的方法的转变。

"Painting, shape." In the eyes of laymen, it is very important to be realistic and understandable, but painting pays more attention to "depicting spirit with form", which started to lead the transformation of painting methods after Gu Kaizhi proposed it in the Wei, Jin, southern and Northern Dynasties.

而在书画收藏的外部性来说就要简单一点，但是也需要我们去做大量的功夫，去寻找有关自己的目标书画的外部资料，列如它曾出现在哪里，它又被谁所收藏过，是否有人的回忆录或者日记里有写过关于这副字画的内容，这些也都是很重要的，值得我们去了解。

In terms of the externality of calligraphy and painting collection, it is easier, but we also need to do a lot of effort to find external information about our target painting and calligraphy, such as where it has appeared, who has collected it, whether someone has written about this painting and calligraphy in their memoirs or diaries, which are also very important and worthy of our understanding.

所以我们在进行书画的鉴赏与评估时，一定要注重它与时代关联的紧密性，这些都能为我们的书画收藏价值的判断带来优势。

Therefore, when we appreciate and evaluate calligraphy and painting, we must pay attention to its close relationship with the times, which can bring advantages for our judgment of the value of calligraphy and painting collection.

书画的收藏价值的评估当然不仅仅是体现在其本身的内容上，要知道社会经济的发展迅速的状态下，任何物品的价值都会在一定的范围内波动。就拿书画收藏市场来说，以前的拍卖和现在的拍卖一定不会在同一水平线上，但是在总体上来说还是处在保值或者增值状态的。

The evaluation of the collection value of painting and calligraphy is not only reflected in its own content, we should know that with the rapid development of social economy, the value of any item will fluctuate in a certain range. Take the painting and calligraphy collection market for example, the previous auction price and the current auction price will not be at the same level, but on the whole, it is still in the state of value preservation or appreciation.

我们在评估书画的收藏价值时也一定要考虑到它在未来市场上的发展趋势，这也需要我们有敏锐的市场灵敏度。把握时机才能站的先锋，才能达到自己预期的目标。

When we evaluate the collection value of calligraphy and painting, we must also consider its development trend in the future market, which also requires us to have a keen market sensitivity. Grasp the opportunity to stand in the vanguard, in order to achieve their expected goals.