Beijing Started to Search Passenger's Bags After Bus Explosion By Boxun Aug 1, 2008 - 2:49:29 AM On July 30, one bus of line 120 exploded in Beijing, the incident has been covered up. Source told Boxun, the explosion happened after 8pm. On July 31, workers on the bus received order to search passenger's bags. Bus line 120 passes Tiananmen, the location of explosion and damage are unkown.