Question

看看下面的英文有无明显错误.On the morning of April 29,2007,from 10:00 to

Answer 1

I think you should add a "school" after primary.

...hundreds of millions of students from primary schools,middle schools,and universities..

It's not required but in English it sounds better if you do so.

One other thing is - April 29,2007 cannot be used as the subject of the sentence.

You should change it to "On April 29,2007,China kicked off a new national initiative.."

The other parts are fine as is.