Colin Montgomerie, the co-winner of last week's Volvo Masters Andalucia, posted a second-round 68 to join Ryder Cup teammate Lee Westwood, American Bob May, Hendrik Buhrmann and overnight leader Ted Oh in second place at minus-6.
Montgomerie may be tired after the late departure from Spain last week, as he and Bernhard Langer played until darkness arrived.
'I didn't sleep at all last night. Luckily, I was off late today,' said Montgomerie. 'Hopefully now, finishing late and after having a shower, two showers, I think I need, I can go to bed and hopefully wake up and feel okay tomorrow. I was up watching football. But the football here in China on television is good, there is a lot of English football which is great.'
Andrew Coltart of Scotland is part of a group at 5-under par. He was joined in seventh place by Rashid Ismail and Rick Gibson.
Jaidee, the 2001 Order of Merit champion on the Asian PGA Tour, dropped a shot on the third but collected birdies on four, five, seven, eight, 10 and 11 for his 67.
'My coach said I was swinging too fast and noticed I had lost my rhythm,' said Jaidee, who won the Myanmar Open at the start of this year. 'It was good advice and I felt that I started to play better in the TCL Shootout on Wednesday.'
The 36-hole cut came at four-over-par 148 and among those who failed to make the cut were current Asian PGA Tour money leader Arjun Atwal and American John Daly.
Daly looked to be in good shape after opening with a 70 but carded a 10 at the par-5 14th to shoot 80 and miss the cut by two.