From Shanghai or Shanghai airport, we would like to spend 3 or 4 days in water towns.

You can find shuttle bus directly from Shanghai airport to Suzhou. Or you can take high speed train from Shanghai to Suzhou. From Suzhou, you can take bus from either Suzhou north bus station or south bus station to Zhouzhuang. From Zhouzhuang, you can also take bus to Tongli. The bus journey is only about 30 minutes.