After my DSE in HK

Well it is hard to study in Hong Kong since all students in HK have to face with an exam called HKDSE, which is an exam that has a major impact onyour life career. Students who don't get a good grade are forced to study a degree or a higher diploma that they aren't interested in. It is very sad.

Day 7 in Lisbon

Today,  we went to see many famous sites, which were recommended to us by other people, such as the Monument to the Discoveries, Belem Tower, and Jeronimos Monastery. We went to the Belem Tower first without eating breakfast because there were famous tarts there, and we wanted to try them. We took the subway and then transferred to a bus. After arriving we saw the Jeronimos Monastery first. We wanted to visit it, but there were a lot of people lined up [I would say "queuing up" but "lined up" is not wrong] outside. We could [or "might"] have had to wait for several hours, so we gave up and went to eat tarts instead. The famous tart restaurant was near the Monastery. My husband was waiting to buy the food while I entered the restaurant to find a seat. After ten minutes, my husband brought four tarts and two coffee into the restaurant. We heard that it was the first tart reastaurant in the world; people from all over the world want to eat there. The tart tasted delicious. It was both sour and sweet, full of a fruity flavor.
After that, we walked a while and arrived at Belem Tower. I would have thought it was a very tall building because it is a tower. But when I saw it, it was not what I expected. It is smaller building which stands on the water, and there was a bridge connecting it with the road. We didn't enter the tower because my friends told us there was nothing in it. The wind was strong [unless you are deliberately using an unusual word for effect]; it made my hair a mess. We took some pictures and left.
We finished our planned activites earlier than we expected, and then we went to the street where we could buy some clothes. Because Lisbon was colder than I expected, I didn't bring many clothes, and we will be going to the mountains tomorrow,  so I needed to buy some thicker clothing.
Luckily, while we were going shopping on the street, we saw many buskers displaying their talents. There was a man doing a show with a puppet-like doll; it was dancing with the music. It was very funny. Another was some students. I think they were students from the same school because they sang together. We can't see these kind of performances in Shanghai, so they were all new to us.
In the end, I bought cheap clothes from H&M. We will be joining a local travel group tomorrow to visit the area surrounding Lisbon. The excellent group was only 8 people. [Which group? If it's tomorrow's group then you need to say "will be" not "was"]

Instead of "I would have thought it was a very tall building" you could say, "I expected it to be".

I really enjoyed reading this; thank you for sharing it. Apart from a few typos, my suggested changes mostly make the piece read more naturally (to me at least!)