It isn't terrible but the sentence structuring is a bit awkward. This is how I would correct it. "I am currently living in the university (xxxx), so that my home address is the same with my university address." (My current address is (xxxx), it is located within the University.) "My affiliation in the body of this letter is expected to be written as:" (My affiliation is written as:) But I have a hard time understanding this sentence but it may be due to my lack of understanding of how your school body works. If you could clarify for me, that would be great. "Please add an additional section in the body of this letter which includes:" (Please add an additional section in this letter which includes:) Try to keep the sentence simple, try not to use too many fancy words. It can make the sentence sound awkward. "Please use one of the ready-to-print address labels (either PDF or PNG format), which are attached in this mail and show my address in both English and Chinese, to send me the original copy of the letter. " (Please use the attached labels and show my address in both English and Chinese so I can receive the original letter) I would of written it somewhat like this... in business, we like to keep language simple and concise. "Additionally, could you do me a favor to email me a scanned copy of this letter before sending it to me?" (Also, can you send me a scanned copy of this letter before sending it to me?) But your original sentence is fine too. I just would of written it like this.

In my childhood,I watched a cartoon,the name is "Lion King". Since then,I like Africa.
When I was young, I watched the "Lion King" and ever since then, I liked Africa!

Grasslands in Africa,have many animals. I like the Lion. Because,the lion is the king of beast,very presitige.
Africa is filled with beautiful grasslands and animals. My favourite animal is the Lion because it is considered the "King of the Jungle".

The other animals I like too,they're very cure.
I, also, like other animals because they are very cute.