from seventh heaven hotel in nanjing road, how to go to Yuyan garden in bus in Shanghai?

From your hotel, you can walk to the Jiujiang Road, Middle Zhejiang Road to take the bus line 805 to Xinbeimen (Chenghuangmiao) Station. Get off the bus, you can walk along the Renan street to Yuyuan.
Your hotel is close to the start of sightseeing bus line 1, SH Urban Planning Exhibition Center Station. You can walk along the Jiujiang Road to Xizang Middle Road and then walk along the Xizang Middle Road to that center to take the bus.

Except the Jade Buddha Temple, you can reach all the other places by the sightseeing bus line 1 and line 2. The line 1 costs around 90 minutes for the whole journey.