Hi, im going to Shanghai on March 24 to 30 and im planning to wear skirt and shorts.

Well, I'm afraid that skirts and shorts won't be suitable ones. The climate will be a little bit cold to wear summer clothes. The temperature may range from 50 F to 60 F. And there may have moderate rainy days. Thus you are advised to prepare jackets, thin sweaters, long-sleeved shirts, jeans and sneakers.