your writing is fairly good to me :D just a few things to share with you
firstly, i think you should pay more attention to the capitalized letter at the beginning a sentence :)
2ndly,
With time passed, the international situation changed considerably.
now, sports competition has brought about a peaceful conditions for competing different people to win valuable and colorful medals.
i think there should be a sentence explain why the changing situation leads to
sports competition has brought about a peaceful conditions for competing for e.g the international situation changed considerably with peaceful solutions becoming the priority in unravelling international conflicts. Something like that, just to make the 2 sentences more connective