I would much incline to support Gary's view that it is NOT a Red-backed Shrike. According to the distribution map of Red-backed Shrike published by Birdlife, it is an European bird with declining population. According to the information from "A Checklist on the Classification and Distribution of the Birds of China" (Chief Editor ZHENG Guangmei), Red-backed Shrike is much restricted to North Xinjiang only.
From the distribution perspective, the "suspected Red-backed Shrike" I saw in Long Yuen yesterday was unlikely to be a real Red-backed Shrike. When I saw the bird, I would say that it mostly likely was a juvenile Brown Shrike.
It would be good to seek expert advice from European and Xinjiang birders.
[ Last edited by mchristine at 2/10/2013 10:43 ]