That depends on what material the commercial house is made of. If the building is made of steel, an earthquake of magnitude 7-8 is generally indestructible, but if it is just an ordinary brick and cement house, it is easy to collapse. It is estimated that an earthquake of magnitude 6 is almost enough.

Wenzhou belongs to Zhejiang, and typhoons blow every year. Considering this factor, the buildings in Zhejiang are generally solid and have a solid foundation. If there is an earthquake, even if the houses collapse, it is estimated that there are only a few, so don't worry too much.