Mr Zhao had already activated the emergency button alerting his high-end security company.
Feng Yu found this amusing and decided to toy with this pair, lying in wait to ambush the so-called high-end security company. In an instant, the burning compound fell into silence with the occasional chirping of crickets under the dark inky night. As expected, the security company was indeed high end arriving at the scene in under five minutes. Unfortunately, they weren't trained to deal with a character like Feng Yu, falling into his trap with ease.
It took Feng Yu half the time it took the security company to arrive at the scene, to kill them all.