The group of them brought the painting back to the bureau. The ancient painting appraisal expert that Lin Qiupu invited had already arrived. He took out a magnifying glass and looked at the painting for a long time, before saying with slight excitement, "Yes, this is definitely the authentic work of Qian Yutan[1]! If you feel uneasy, you can do a carbon-14 appraisal, but as an expert, I have a suggestion. This painting is very old, and you must be careful when appraising it, because any damage is irreversible."

Lin Dongxue expressed her gratitude to him and asked whether they needed to pay the appraisal fee, but the appraisal expert smiled magnanimously. "No need. It’s a citizen's duty to assist with detective work!"

"By the way, do you know all the collectors in Long’an?"

"I know a few."

"Have you heard of Lie Guoxiao...