i want to go from No.21,Jianchang Road to water park and cao zhuang flower square in Tianjin.

To Water Park, walk from where you are to Jianchangdao bus stop to take bus no. 675 and get off at Tianta. Then the park is within 500 meters away.

To Caozhuang Flower Market, you can take bus no. 670, 671, 1, or 619 to get off at Nanshi station. Then walk to Dongnanjiao metro station to take subway line 2 and get off at Caozhuang station. Its exit B is around 1.2-1.5km from the square, so you can take a taxi to reach in several minutes.

I also wanna know the way from No. 21, Jianchang Road to Italian style street and From Italian style street to water park .

take bus no. 27 to the Italian style street directly. Then near the street, take bus no. 8 or 832 and get off at Tianta. Then walk to the Water Park.