There is no direct bus from Zhujiajiao Ancient Town to QIbao Ancient Town. It takes about CNY140-160 by taxi. If you go to Zhujiajiao, then not necessary to Qibao.

be prepared to travel for over an hour in a taxi to Zhujiajiao, it's well worth the visit and there are some great places to eat (particularly a small wooden building set back from the river at the North end, labelled lunch, beer, food). Be organised as well - My friends and I found it very difficult to get a taxi back to the city centre after.