Is there a direct bus to Jianguo hotel at Caoxi Road in Shanghai?

Where do you start, the Shanghai Pudong airport?

If you mean the Pudong airport, there is no direct bus. You can take the airport shuttle bus line 7 to SH South Railway Station and then walk to the subway station to take the subway line 1 to Xujiahui Station. Get out of the station from Exit 2, you can see your hotel.