The city I live in now is called Fuyang, which is a prefecture-level city in Anhui Province, and is located in the northwest part of Anhui Province.

Shortened for concision.

The tallest building only had five floors, and there were only 5 total public bus lines were only five.

Now Fuyang is currently in third or fourth place among prefecture-level cities in the Anhui Province (Anhui Province has 16 prefecture-level cities).

The tallest building in the city has 58 floors (240 meters high), and the totalre are 75 public bus lines are about 75in total.

Now iIt looks really like a big city now.

The city I live in now is called Fuyang, which is a prefecture-level city in Anhui Province, and is located in the northwest part of the Anhui province.

I first came to the city to learn instudy at a technical secondary school.

The schoolIt was an agricultural mechanization school in the northern part of the city.

Fuyang was built where the Ying River connected tomeets the Quan River,; so, the city wais divided into three parts by the two rivers.

At that time, the city only covered an area of 16 square kilometers and had 160 thousand000 people.

The tallest building had only had five floors, and the totalre were only five public bus lines were only fivetotal.

Now, Fuyang is inthe third or fourth place amongbiggest prefecture-level citiesy in Anhui Province (Anhui Province has 16 prefecture-level cities(the province has 16).

It covers about 200 square kilometers of urban area and has a population of about 2 million.

The tallest building in the city has 58 floors (240 meters high), and the totalre are a total of 75 public bus lines are about 75.

Fuyang now has an airport, a high speed railway station, an ordinary train station, and four long distance bus stations.

It also has two universities, three colleges, and six government owned hospitals.

Now it looks really like a big city.

Fuyang was built where the Ying River connecteds to the Quan River, so the city was divided into three parts by the two rivers.

Here 'connects' should be in the present since both rivers are still there (I assume). If the rivers are no longer there, i.e. they dried up, then you would have been correct and you would use the past tense 'connected'.

The tallest building only had five floors, and the total number of public bus lines wereas only five.

The tallest building in the city has 58 floors (240 meters high), and the total number of public bus lines areis about 75.

Similar correction to before. Note in both of these corrections I have corrected the conjugation of the verb since it refers to 'number' which is singular.

Now it looks really looks like a big city.

This word order feels more natural to me, although I wouldn't consider your original order as incorrect.