ECNS.cn has a few more details on the reshoot at the Chongqing's Wulong Karst National Geology Park in China. As before there was no mention of cast and crew so it seems the filming mostly involved getting establishing shots and plates for CGI purposes.

The final cut of this scene is about 2 and a half minutes. The shooting is mainly for a bird's eye view of the two bridge-like landforms, and a fight scene between transformers takes place under them. Then a transformer walks out from below the two "bridges". Huang Daosheng, Manager of Wulong Karst Landform Co., said.

Because the bridges are part of a world natural heritage, the film crew did a thorough test to make sure the shoot would not damage the bridge. The shoot has also lured a number of curious tourists to the site.