What affect did the reforms that the tang rulers introduced have on china?

Well the Tang made China's government stronger. They went back to using the civil service examinations for choosing government officials. Government officials could no longer use family connections to get them jobs. They also gave land to farmers and brought back order to the countryside. The effects helped China rebuild itself, offering better standers of living to its people.

They went back to using the civil service examinations

Ais 190 b is 200c it can't be more then 100%