I'd like to take shuttle bus from Xiaoshan airport to Zhejiang University Zijingang Campus.

Hi, there is no direct bus going to the campus, and you can take the shuttle bus+taxi mode:
take the shuttle bus Wulinmen Line to Wulinmen Civil Aviation Ticket Office. And then take a taxi to the campus at a cost of CNY25. Or take the bus 900 at Wulinmen to the destination directly.

If taking a taxi from the airport, and the fare would be CNY100- 120