As the ultimate magic artifact of the Demon Path, the Ten Thousand Soul Banner, even if now torn and only one-tenth as powerful, still possesses absolute control over its Fan Soul.
Whether it's memory or thought, they will be imprinted by the Ten Thousand Soul Banner, belonging entirely to the Banner Master.
How easy it is for a person to recall what they've seen, it is just as easy for Shen Siyuan to glance through the Fan Soul's memories.
Only, Shen Siyuan doesn't like to peruse their memories casually; he sees them as independent beings despite being Fan Souls.
When Shen Siyuan looks at the Fan Soul's memories, not only does it cause no harm to them, but they don't even notice it happening.
Thus, with Shen Siyuan's fingers weaving the formula, in an instant, he knows all the memories Dou Dou had last night.
After realizing Dou Dou's memories, Shen Siyuan asked Taozi to bring his phone, and after a quick search, he found Granny Cui's location.
