Liehuo spoke gravely, resting his hand on his forehead, as some matters began to slowly unravel in his mind.
The technical survey from thirteen years ago was certainly inferior to today's. After burning, the aluminum powder turned into aluminum oxide, a powdery substance mixed in with the burned materials, too easily overlooked.
However, all of this was merely his speculation—
Thirteen years had passed, and all evidence was gone, with the most knowledgeable person, Old Madam Shen, having lost her memory.
Glancing at him, Lian Qiao reminded him quietly, "Actually, you could ask Aunt Xuan about this?"
According to Liehuo, Aunt Xuan had lived with her sister since her teenage years, and they had been inseparable. Therefore, she must be the most informed person about the Weilai Garden from its construction to the subsequent fire. Even if she didn't know why the fire started, she should at least know about the issue with the building materials, right?