Sorry that I have to split this into two parts, my internet access is not very stable.
Anyway, let's resume from here:
Grown up in a big city since the day they are still a child, they can learn at the school with good teacher as well as their parents finance, to join the activities at school or community with their friends it make them develop the communication skill,
This seems to be a very ambitious sentence, but I am a little confused by the parents finance part. Do you mean:
Growing/Brought up in a big city, children can benefit from the good teaching facilities as long as their parents can afford it. Meanwhile, taking part in the activities either on or off campus can help kids develop their social abilities.? Or, do you mean --
Living in a big city, children can benefit from the good education resources as well as their parents benefit from the job opportunities.
?
Moreover to relax with convenience facilities as swimming-poor, libraries, or computers,,, whenever they get sick the good hospitals with professional doctors nearly. Not only that of these they can attend many kinds of big event as festival or concerts, fairs as well as with multiple options of fashion, commodities, To enjoy convenience transportation system.
I am not sure whether you mean this or not:
Moreover, cities provide people more recreation facilities such as swimming-poor and theatres, and other high quality public facilities like libraries and hospitals. More importantly, convenient transport system enjoyed by urban citizens provides them chances to go to the countryside whenever they want.
In sum, Grown up in a big city is lived in a dynamic environment to approach advanced technology, convenience facilities and freedom of choose all kind of commodities as well as services,
In sum, growing up in a big city means life with dynamic environment, advanced technology, convenient facilities and freedom to enjoy various commodities as well as services.
Since you mentioned advanced technology in the last paragraph, I think it will be much better if you make a little development on this part. Give some examples about advanced technology.
Thank you:)