This year marks the 60th anniversary of the founding both(cancel "both") of the great People's Republic of China.Our country has indeed undergone tremendous changes over the past 60 years,having transformed from a destitute,under-developed and humiliated country to an increasingly powerful state with a high international standing.The living standard of the Chinese people has been improving and the development of our country has been widely recognised throughout the world.Especially in 2008,We(change this part to "the world,especially in 2008 when we held") Held the the twenty ninth Olympic Games,which is the great green Olympics.In that Olympics(change to "During the games"),Chinese athletes won 51 world champions(change to 51 gold medals),carried off 100 medals.By virtue of this historical breakthrough,not only the Chinese athletes have established their status in the international sports arena but have also embody(change to "but also has embodied") our country is becoming more and more stronger(change to "our country's becoming stronger and stronger").The success of the Beijing Olympic Games has greatly enhanced China's international status.More and more and more(change to "More and more ") foreigners come to China,people are(change "are" to "have") more and more profound understanding of China.
It is the common aspiration of the entire Chinese people is(cancel this "is") that our country be powerful and prosperous.we do sure that not in the future(change to we are sure that in the near future),our country will be a state powerful enough to influence events throughout the world.
整体还是很流畅的,虽然有不少地方用词重复或语义重复,但我只改了语法错误.希望对你有用.