You can take a bus to Tianhe Bus Terminal, cross the road and go straight for a few hundred meters. There is a hotel called Huatong Guest House, and there is a stop next to the guest house. There is a direct bus to Mianhu, so you should make an appointment first (020-87088477). After booking a ticket and getting on the bus, tell the master to get off at Mianhu East Campus, and then take a motorcycle to Ronghua, which costs about three to five yuan.