Tibetans, "hide their heads and protect their tails" also. "Hide the head and protect the tail" refers to the use of "reverse front" when starting and closing the pen, so that the nib is not exposed. In other words, "first left and then right, first up and then down" and "writing against the wind" are the most standardized starting points of regular script, that is, taking "against the wind". Those who "oppose" are also opposed. Laozi said, "The movement of Tao is the opposite." Force from the opposite direction is the driving force of the movement of things, contrary to fortune. For example, farmers dig and want to go down first; When a boxer punches, he has to stretch first and then retract. This is the birth of strength, and this pen is Qi Li. It is showing the law of "the movement against the Tao".

Exposed, nib exposed. The front and side of calligraphy. Those who go out of the front will not accept it. The side striker is a pen with the front end exposed on one side. They all emphasize the sharpness and openness of brushwork, and can show the spirit of being fierce, rigorous, powerful and generous.

Concealed and exposed, each has its own length. Hiding shows implicit and inner strength and interest. Dew, showing the beauty of strength and just folding. Although they are complementary, they are opposite and complementary. In calligraphy creation, it should be: there is dew in hiding, there is dew in hiding, there is tangible in hiding, and there is clumsiness in dew. In calligraphy, it is often said that "the hidden front is full of smell, and the exposed front shines outside." Between hiding and dew, such as the transformation of yin and yang, it seems that the five elements are born together.

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