Cleaners are seen next to a self-driving electric concept car NIO Eve displayed at the second media day for the Shanghai auto show in Shanghai, China April 17, 2019. The 18th Shanghai international automobile industry exhibition runs from 16 to 25 April. (Photo by Aly Song/Reuters)





A worker cleans an electric vehicle at the BMW booth during the Auto Shanghai 2019 show in Shanghai Wednesday, April 17, 2019. Automakers are showcasing electric SUVs and sedans with more driving range and luxury features at the Shanghai auto show, trying to appeal to Chinese buyers in their biggest market as Beijing slashes subsidies that have propelled demand. (Photo by Ng Han Guan/AP Photo)





A Mitsubishi's e-Yi Concept SUV is presented during the media day for Shanghai auto show in Shanghai, China April 16, 2019. (Photo by Aly Song/Reuters)





An Icona Nucleus self-driving electric concept car sits on display during the media day of the Auto Shanghai 2019 motor show in Shanghai, China, 16 April 2019. (Photo by Wu Hong/EPA/EFE)





A Citroen Ami One concept car sits on display during the media day of the Auto Shanghai 2019 motor show in Shanghai, China, 16 April 2019. (Photo by Wu Hong/EPA/EFE)





A journalist looks at the front of a Hyundai Nexo car presented during the media day for Shanghai auto show in Shanghai, China April 16, 2019. (Photo by Aly Song/Reuters)





A Renault EZ-Ultimo concept car sits on display during the media day of the Auto Shanghai 2019 motor show in Shanghai, China, 16 April 2019. (Photo by Wu Hong/EPA/EFE)





Chinese models pose beside a MUSE fully-electric self-driving car developed by W Motors and ICONIQ Motorsduring the 18th Shanghai International Automobile Industry Exhibition, also known as Auto Shanghai 2019, in Shanghai, China, 16 April 2019. Dubai-based W Motors and ICONIQ Motors have teamed up to unveil the MUSE – a fully-electric self-driving car at Auto Shanghai 2019. It features an advanced infotainment system and smart on-board services, innovative wide screen user interfaces and advanced cloud-computed connectivity. (Photo by Imaginechina via AP Images)





A Qiantu K50 Spyder sits on display during a media day of the Auto Shanghai 2019 motor show in Shanghai, China, 17 April 2019. (Photo by Wu Hong/EPA/EFE)





A man cleans a Nissan IMs concept car displayed during the media day for the Shanghai auto show in Shanghai, China April 16, 2019. (Photo by Aly Song/Reuters)





The interior of the Audi's new concept AI: ME with automated driving system is presented during the media day for Shanghai auto show in Shanghai, China April 17, 2019. (Photo by Aly Song/Reuters)





Covered vehicles are seen at the booth of Volvo ahead of the Shanghai Auto Show, in Shanghai, China April 15, 2019. (Photo by Aly Song/Reuters)