The diamond was locked in a safe box that was protected under the highest level of security. This was the most highly secured safe in the world with three levels of locks. If someone wanted to unlock the safe, their iris and fingerprints were scanned while the voice and tone of their voice were also detected. Even if someone had killed Ye Ling, chopped his fingers, dug out his eyes, and imitated his voice, they would not know what sounds to make. No one knew what they had to say to open up the safe at the last level of security. In other words, only Ye Ling could open this safe box.
Shen Qianshu had to retrieve this diamond!
She had to pretend to be someone else.
As such, Old Qian was the best person she could disguise herself as!