When they decided to enjoy a rare day off and take a break from work, they discovered the real tragedy of Los Angeles.
Anyone who wanted to visit South California had to forget those postcard pictures of the blue sky and the green ocean designed to appeal to tourists living at high altitudes.
A person residing there or a traveller who would like to visit the Walk of Fame had to put up with two things.
One was the terrible traffic jam, and the other was the haze.
In 2003, when the sky above Beijing had still been clean and blue, Los Angeles had already been foggy. As a result, Qin Guan had to abandon public transportation and rent a bike.
In Los Angeles, the bicycle was the fastest and most convenient transportation vehicle. The temperature that day was a surprising 33 degrees, which was a miracle for July.