Hello, I come from Beijing，, China. I am 14 and I am a student in grade 9. I want make friends to improve my Ccommunication skills. I can also introduce you to my country and Letshow you know the excellent traditional Chinese culture.Chinese culture It is broad and profound with 5000 years of history, If you like, I can tellshow it to you. Hello, I come from Beijing, China. I am 14 and a student in grade 9. I want make friends to improve my communication skills. I can also introduce you to my country and show you know the excellent traditional Chinese culture. It is broad and profound with 5000 years of history, If you like, I can show it to you.

Repeating "I am" isn't necessary but still correct. It is better to use "show" instead of "let" if you are talking about introducing something to someone. Instead of repeating "Chinese culture" you can use "it"

Hello I comeam from Beijing，, China. I am 14 and I am a student inyears old and in the 9th grade 9. I want to make friends to improve my Ccommunication skills. I can also introduce you to my country and Lettell you knowabout the excellent, traditional Chinese culture. Chinese culture is broad and quite profound with a 5000 years history,. If you like, I can tell you. Hello I am from Beijing, China. I am 14 years old and in the 9th grade. I want to make friends to improve my communication skills. I can also introduce you to my country and tell you about the excellent, traditional Chinese culture. Chinese culture is broad and quite profound with a 5000 year history. If you like, I can tell you.

Hello. I come from Beijing，, China. I am 14, and I am a student in grade 9. I want make friends to improve my Ccommunication skills. I can also introduce my country and Lethelp you get to know the excellent traditional Chinese culture. Chinese culture is broad and profound, with 5000 years history,. If you like, I can tell you all about it. Hello. I come from Beijing, China. I am 14, and I am a student in grade 9. I want make friends to improve my communication skills. I can also introduce my country and help you get to know the excellent traditional Chinese culture. Chinese culture is broad and profound, with 5000 years history. If you like, I can tell you all about it.

It's would be my honor. It would be my honor.