Thank you for your thank-you letter, about 400 words. Pay attention to the format.

The name engraved on the board is not necessarily immortal, nor is the name engraved on the stone. Only the names engraved in people's hearts can last forever. Teacher-the engineer of human soul, only this glorious name, because it has the connotation as rich as the sea and as deep as the blue, will remain in my heart forever. Some people say that teachers are like mountains. When the mountain arrives, it will make later generations work hard. As the saying goes, "new bamboo is taller than old bamboo branches, and it is all supported by old cadres." The progress and achievements of the whole class are all condensed with your's hard work. Therefore, no matter when and where, no matter the ends of the earth, I will sincerely call you-dear teacher! In front of this sacred and noble word, I will always be a student who needs your enlightenment! Teacher, you may forget that I made you angry and screwed up by being naughty, but I can't forget that you are my young teacher. Why don't you want anything? You don't have to read it late at night; Don't smile at my tired body. Perhaps, your children are waiting for your care at home; Maybe your elderly parents expected you to come to them, but you came to us because you had our little stage and great achievements in your heart. The three-foot platform, with limited space, carries your lofty ideals and brilliant career! You sow with words, cultivate with chalk, irrigate with sweat, and moisten with painstaking efforts. Every silver thread of yours has witnessed my growing process; Every wrinkle of yours is deeply engraved in my heart. Looking at the flowers blooming everywhere, which one is not as hard as yours, and which one is not as hard as yours! Dear teacher, please rest assured! I will certainly remember your earnest teachings and live up to your earnest hopes. Under the beautiful environment and tree-lined Pingshan Mountain, I will, like those old and new alumni who have made great achievements, have greater aspirations and higher ideals, further carry forward the "spirit of valuing work", cherish time, study hard, strive to become a pillar of the country, and repay the school with fruitful results and brilliant achievements. Thank you again for your cultivation over the past few years! Dear teacher, you have worked hard! Pay tribute to the sublime! Your student: Dear XX.