Su Yunjin thought it was those two thugs, but Gu Ya didn't agree.
Gu Ya felt that the fire that destroyed her and the young wife's shop was most likely the doing of a certain tavern in the town. Earlier, someone had come to threaten to smash their shop, but then word came from the Prince Qi Residence, stating that anyone who dared to trouble their Zuixiang Restaurant would be crossing the Prince Qi Residence.
Those jealous of their shop's business could no longer do so openly, so they had to resort to underhanded tactics.
This time, their shop being burned could very well have been a targeted attack. Gu Ya thought it was his fault for being too careless and felt he should have been more vigilant.
If he had taken precautions earlier, then their shop wouldn't have been calculatedly burned to the ground. Gu Ya roughly speculated the reasons for the shop catching fire.