(Yicai Global) June 30 -- Sales of car sunshades through ByteDance's short video platform Douyin spiked this month, as owners of new energy vehicles complain about poor heat shielding in autos with panoramic sunroofs amid China’s high summer temperatures.

The number of sunshades for cars sold on Douyin surged 18-fold in June from a year earlier, according to data from Douyin, the Chinese version of TikTok. Sales of glass explosion-proof shading film soared six times.

Sun-protection products for autos sold on Meituan jumped 272 percent this month from a year ago, according to figures from the Chinese takeout platform. The three most popular were windshield sun visors, curtains, and sunshades.

Sales took off in May, a Douyin vendor told Yicai Global, adding that they are set to be better between this month and August based on data from previous years.

US electric vehicle maker Tesla was the first to introduce panoramic sunroofs to its car models, and they has now become standard in many mainstream NEVs.

“There is less space in an NEV than there is in a fuel car due to the positioning of the power batteries,” according to Chang Bing, vice president at Hozon Auto and general manager at Hozon Auto's design center. “Panoramic sunroofs solved this issue quite well, but brought another user experience problem -- searing heat from the summer sun.”

Auto companies are installing panoramic sunroofs in an increasing number of new vehicles, a research note from Ping An Securities said. It will be the industry trend, according to Cao Dewang, chairman of Chinese auto glass giant Fuyao Group.

Editors: Shi Yi, Martin Kadiev