Hi .ill be at the park plaza hotel.whats the best subway route to the china international exhibition centre.

Your hotel is in Wangfujing area, right?
If so, you can walk to reach Denghikou Station where you can take subway line 5 to reach Huixinxiejie Nankou Station. There you can change to line 10 to reach Shaoyaoju Station. From Shaoyaoju Station, you can find line 13 to reach Wangjing West. At Wangjing West Station, you can take subway line 15 to reach China International Exhibition Center Station directly.
The subway fare is 2RMB.