请用英语来描述上海，50到100单词，小学水平就行

shanghai is the economic center of china.It is a modern city with a long history.It attracts great amount of people from both home and broad to work and visit here. it lies beside the East Sea and is an important port of china.it has both grand modern architectures and many historic sites. it is a city worth visiting.

http://en.wikipedia.org/wiki/Shanghai