C341 Shedding of Cicada

I understand what the Widow Zhang meant was that there is no one that is suspected of being 'oil seller'.

Lin Zhishu thought for a while, and at the moment, the only ones who deserved to be suspected were Old Master Zhang and that woman called Yue Shuang.

Elder Sister Zhang said that she knew of Old Master Zhang, but she did not know who Frost was. But Old Master Zhang isn't a good guy