The force shattered windows and hurled debris that flattened tyres in cars 100m away, according to reports on state-run China Central Television. At least 20 vehicles were damaged in the blasts. A bus outside the building was left with its back window smashed and its paint flecked with shrapnel.
The bombs were small but sophisticated. Police investigators said they found computer circuit boards among the debris, perhaps part of a timer system.
One left on the other side of the street, outside the offices of the government-run Shanxi Literature and Art Union, exploded with enough force to pepper second floor windows 30m away. Blood stained the pavement below.
There was no confirmation of the identity of the fatality, but bystanders said an elderly woman was hit while walking her granddaughter to primary school.
The bombs appear to be confirmation that the simmering anger that has bubbled over in recent years in the form of street protests throughout China has hardened into more drastic, and deadly, action.
Local people said the building in Shanxi targeted yesterday has been a magnet for protests. Taiyuan has one of the largest wealth disparities in China, with the emergence in recent years of a class of wealthy coal barons. "There are so many groups of people who would have a reason to do this," said a 53-year-old man near the scene.