The ending of my composition after 20 years in my hometown is as follows:

Twenty years later, in my hometown, I witnessed the power of science and technology and saw how the place where I once lived became a vibrant modern city. I am amazed by the changes in the environment and deeply moved by the happiness of people's lives.

I walk in the street and I can see the shadow of high technology everywhere. Artificial intelligence assistants are providing convenience for people, driverless cars are driving smoothly on the road, and green energy technology is widely used in every corner. This once familiar city has completely changed, becoming more livable and more harmonious.

However, I am gratified that although the development of science and technology has brought many changes, people in my hometown still maintain that simplicity and enthusiasm. While enjoying the convenience brought by science and technology, they also cherish those beautiful traditions and customs. This unique cultural atmosphere makes me feel very cordial and makes me love this place even more.

Looking back on my growing years here and looking at everything now, I deeply feel that the future of my hometown is full of infinite possibilities. I look forward to witnessing the changes in my hometown in the future, and I hope this place can always maintain its charm and vitality.

Finally, I want to say that no matter how technology develops and the world changes, my love for my hometown will never change. This place is the cradle of my growth and my spiritual sustenance. I am willing to contribute my strength to its prosperity and development, and I am willing to continue to find and feel my homesickness here.