• My hometown is Nha Trang, city It's a coastal city, on the South Central Coast of Vietnam.

  Nha Trang is well known for beautiful beaches and scuba diving. It is very popular with Vietnamese and foreign tourists because local people are very nice, prices are reasonable and the weather is wonderful.
  
  Nha Trang is a quiet place. I really enjoy running along the  side coast in the morning,.  The air is pure and the sunshine is so gorgeous. Besides, local cuisine is the most thing you should have to experience.

  In addition to the wonderful climate, the local cuisine is also something you should experience. Nha Trang is well-known for seafood. In any restaurant, these All restaurants offer the  a wide range of seafood, such as fish, oyster, crab, and shrimp...  All of them are fresh and inexpensive. You can choose order,  then they will quickly cook and serve immediately at the table.

  
  

  Good job describing your hometown. In English, we usually don't add the word "city" onto the name of our hometown because the word "hometown" implies that it's a city or town. Also, since the cuisine is a new topic, I suggest making it a new paragraph. Finally, nobody can cook and serve your meal "immediately," but "quickly" works. Overall, good job. 

My hometown is Nha Trang city

Nha Trang is well known for beautiful beaches and scuba diving. Not only Vietnamese but also foreign tourists fall in love with Nha Trang because of the kindness of indigenous people, the reasonable price and the wonderful weather.

Nha Trang is also a land of peace. I love running along the coast on a quiet morning. The gorgeous sunshine and the clear air usually leave me feeling refreshed.

One more thing that visitors definitely should not miss is delicious local food, especially seafood. The choice is extensive. It could be fish, oyster, crab, shrimp, etc. You can select a fish, a crab or a shellfish and have it prepared and cooked in front of you. Although the food is fresh and delightful, they are super inexpensive.

Well done! I would recommend you to avoid using the same word/pattern within the same paragraph.