1.I have been in China for twenty four years.I have been in this city for twenty years. I know much about this city.Although I went to many cities，I still think my home city is very good. It is very convenient to get food in my community. On weekends there are many people singing on the street.I like to sit in the crowds，playing phone games and listening to music. 2.I have been writing for 18 years.When I started my elementary school，our Chinese language teacher told us to keep a diary as our homework.I always worked hard to write more words，to make my diary more detailed. When I was in high school，I tried to write some novels.At that time，there were many talented students，my novels were not so great to catch my teacher's eyes. When I was at university，I published some novels on the internet and many people liked them.There were some people copying my novels，so I stopped publishing my novels on the internet 1 year ago，now I just keep it/them in my computer. Yayyy well done. Great use of tenses. You got the perfect ones just right. Great!

Here's a corrected and polished version of your text: 1. Personal Experience in China: I have lived in China for twenty-four years, and I've been in this city for twenty of those years. I know a lot about this place. Although I've traveled to many other cities, I still believe my hometown is the best. Getting food in my community is very convenient. On weekends, the streets are lively with many people singing. I enjoy sitting in the crowds, playing phone games, and listening to music. 2. My Writing Journey: I have been writing for 18 years. When I started elementary school, our Chinese language teacher encouraged us to keep a diary as homework. I always worked hard to write detailed entries and include more words. In high school, I ventured into writing novels. There were many talented students back then, and my novels didn't stand out to catch the teachers' attention. During university, I published some of my novels online, and they received positive feedback from readers. Unfortunately, some people started copying my work, so I stopped publishing online about a year ago. Now, I keep all my stories saved on my computer. Notes: Grammar: Corrected tenses and improved sentence structure. Word choice: Added variation to avoid repetition (e.g., "novels," "stories," "detailed entries"). Flow: Enhanced readability by combining some sentences and improving transitions. Does this reflect what you intended? 😊