My hometown

I come from Zhangjikou, which is a small city in Hebei province. It’s surrounded by mountains, so it’s often called mountain city by people. There are many grasslands in my hometown, and when summer comes, the vegetation becomes luxuriant and the flowers are blooming everywhere. The scenery is gorgeous, like a picture, and many people choose to have a picnic there. They can enjoy the nice view and the fresh air, and the most stimulating* thing to do is to ride a horse there because you can have a joyous sense of freedom. My hometown is undeveloped. There is are no magnificent tall buildings, no luxury hotels, and no subways, but it is peaceful and the people there were are simple and honest by nature, so I really like it. The only thing I hated is the weather because it's always windy there, and the dust storm may comes in spring and fall which makes me can not it difficult for me to breath outside.

* It may be more natural to say something like this:
They can enjoy the nice view and the fresh air, and the most exciting thing to do is to ride a horse there because you can have a joyous sense of freedom.

Good! Be careful with commas and spacing.

First of all bravo! This is very well written I see, just a few mistakes. One of them is a bit important for writing but not so much for speech, it is: run on sentences. You have some VERY long sentences with thoughts that may be similar, but that can still be written as separate sentences. I was going to change it for you, but it is better for you to figure this out on your own.....Second beware of repitition. Most people will not catch this is speech but in written form you are able to look back and see how many times certain words were said. I saw 'it's' and 'there' many times. Contractions are good, but sometimes it is better not to use them, and also rather than using 'there' substitute it for another word, maybe the name or nickname of your hometown. This too I will give you the chance to correct on your own. With These Things it is not really wrong...but not completely right either.

MY hometown

I come from Zhangjikou, it’s a small city in Hebei province , it’s surrounded by mountains so it’s often called mountain city by people. There are many   is a lot  of (or 'an abundance of ) grassland in my hometown , when summer comes , the vegetation becomes luxuriant and the flowers are blooming everywhere , the scenery is gorgeous like a picture ,many people choose to have a picnic there , they can enjoy the nice view and the fresh air , the most stimulating thing is to ride a horse there, you can have a joyous sense of freedom. My hometown is undeveloped , there is no magnificent tall buildings ,no luxury hotel and no subways, but It is peaceful and the people there were simple and honest by nature , so I really like it. the only thing I hated is the weather, it's always windy there, and the dust storm may comes in spring and fall which makes me can not  it difficult for me to breath outside.