Write a paragraph, combining positive description and profile description to show someone a special skill.

Teacher Liu loves calligraphy very much. He is a famous calligrapher here. He is strict and patient when he helps us practice calligraphy. I remember it was a morning on New Year's Eve. As usual, he explained the history of calligraphy, analyzed the structure of Chinese characters and corrected our problems, as if he didn't know what day it was today.

Although learning to write with Mr. Liu is only a short year, under his careful guidance, our calligraphy level has improved obviously. The regular script written by Liu Xin was selected for exhibition in Beijing Children's Palace. Han Zhen won the second place in the provincial youth calligraphy competition, and my work also won the first prize in the national youth calligraphy competition. Whenever I talk about these achievements and honors, I will think of Mr. Liu's kind face and his inculcation.

Comments: The first three sentences of this passage are positive descriptions of Mr. Liu, and each sentence is directly related to the teacher. The following sentences describe our achievements and honors in the process of learning calligraphy. Although it is not written directly about Mr. Liu, it shows his level and achievements from the side. It is because of the combination of front and back that this passage left a deep impression on readers-Mr. Liu is really a respectable and good teacher.