Is there Halal Rest in walking distance near Le Royal Meridien Shanghai & Park Plaza Beijing Wangfujing?

Yes, within the walking distance from both of your two hotels, you can find the halal restaurants.
From the SH Hotel, you can go to the Ye Li Xia Li Muslim Restaurant on 7F, Bailian Shimao International Plaza at No. 819, East Nanjing Road Station. This plaza is just next to your hotel.
From the BJ Hotel, you can walk to Jin Bao Xuan at No. 3, Jinbao Street. From your hotel, you can easily walk to Jinbao Street and then walk along this street to reach Jin Bao Xuan easily.