China's ECNS.cn is reporting that a Transformers 4 crew returned to Chongqing's Wulong Karst National Geology Park for some reshoots. The area was one of the locations Michael Bay and company filmed at back in October 2013. The article doesn't indicate if Bay or any of the cast was on hand but it sounds like 2nd unit coverage to assist with a CGI sequence.

Due to the recent script alterations, the crew was forced to once again visit the Three Natural Bridges scenery of Fairy Maiden Town in Wulong County on Monday, and used two helicopters to get several grand aerial shots of the tiankengs (giant dolines) and naturally formed bridges on Tuesday and Wednesday. The scenes they shot will be used in "Transformers 4" to add visual impact.

(va TFW2005)