Workers construct the roof of the Tesla Gigafactory in Shanghai on April 8. Photo: VCG

Tower cranes are seen at the construction site of Tesla Gigafactory in Shanghai on April 8. Photo: VCG

Several metal roofs are constructed at the construction site of Tesla Gigafactory in Shanghai on April 8. Photo: VCG

Two workers check steel roof structures at the construction site of Tesla Gigafactory in Shanghai on April 2. Photo: VCG

Workers check the steel roof at the Tesla Gigafactory construction site in Shanghai on April 2. Photo: VCG

A worker stands near a sign which points to the Tesla Gigafactory construction site in Shanghai on April 2. Photo: VCG