According to this PLA Daily news announcement (here), the PLAAF 9th Air (Fighter) Division, Guangzhou Air Force, received its first batch of four J-10s on December 21st 2009
Back in October, there was speculation that the 5th J-10 line regiment was being formed (here) and the PLA daily announcement and publicly released photos confirmed it. This is the second upgrade the 9th has conducted during the last five years. In 2005, it's 24th Fighter Regiment at Guangzhou was upgraded to the J-7E and now the 25th Fighter Regiment is dropping its old J-8IID heavy-fighter for the new J-10.
The 9th Air Division emblem is located in the upper-left-corner of this photo.