One possible version:
October 20 Sunday Fine
In order to help Yuejin Elementary School in the western region, my classmate Wang
Gang and I went to the street to sell some precious stamps. Before we began to sell our
stamps, we put up a board beside us. On the board we wrote "Help poor children, please."
To our surprise, many people bought our stamps. It was not long before we sold out all
the stamps. With tile money, we went to buy some story-books in file book shop. Then we
posted all the books to Yuejin Elementary School in the post office. We were very tired
today, but we still felt very happy.