Dear Mr. Liu,

I hope this letter finds you well.

I'm Li Hua, a student studying in your class. Due to the intense preparation for Gaokao, I'm writing to eagerly present to you the below suggestions.

Primarily, it is of vital significance that the learning pace should be slowed down for more time to digest the acquired knowledge. Additionally, it's strongly proposed that key points should be emphasized with additional exercises. Meanwhile, it's extremely advisable that a proper learning approach, instead of countless homework, should be provided to ensure better academic performance. Lastly, it would be better if more encouragement could be given and students' psychological well-being could be well taken care of.

Sir, your thoughtful consideration of my proposals is highly appreciated.

Yours sincerely,

Li Hua