A bus driver in the city of Changchun Jilin province installed two purifiers that he had made himself in his bus for the benefit of passengers not long ago. 

Yang Hongtao, air purifier inventor, checking the machine's performance. [Photo by Wang Zhendong/365jilin.com]

The 43-year-old Yang Hongtao say that he felt he needed to do something concrete for the sake of the passengers in view of the city's poor air quality, as he put the two purifiers on his bus, on Feb 27. So, he searched on the Internet to find the materials while studying how to make an air purifier.

Yang's PM 2.5 air filter may not look all that fancy, with its two acrylic plates, fan, sterilization package, and a filter cartridge, but, his creation’s real unique quality is that it's powered by solar panels instead of electricity which got it a good reception from the passengers.

Bus manager say the air purifier is expected to be added to 10 more buses this year, but that it does need further refinements.