From Hong Kong to Guzhen:
You can take the ferry at the Hong Kong City Port at Tsim Sha Tsui. There is only one ferry for each day, it leaves at 15:40.After arriving at the Zhongshan Port, you can take the No. 1 Bus and change to the No.8 Bus at the Xiaoshangpin Shichang(小商品市场)，the destination of the Bus 8 is at the Guzhen Huayuan.

From Macau:
First, pass the Gongbei Port, then take bus at Gongbei Bus Station, the bus is from Zhuhai to Jiangmen, get off at Guzhen in the middle of the way.
The Gongbei Bus Station is near the Gongbei Port.