Zhao Tiezhu certainly knew the answer.
Others might only marvel at the speed of Qin Hai's kick just now, but Zhao Tiezhu knew that Qin Hai's speed was not only extremely fast, but his control over power had also reached a very high realm. Even the spot he chose to land his foot was a subject of great learning.
In fact, if Qin Hai had wanted his life, that kick just now would have been successful. The moment Qin Hai's foot struck his chest, a massive, unparalleled force had instantly sent him flying. Zhao Tiezhu felt as though he wasn't facing Qin Hai, who was half a head shorter than him, but as if he had been hit head-on by a two-ton rhinoceros.
At that moment, he almost thought he was a goner. But just as his feet left the ground, and he was knocked backwards flying, that tremendous force suddenly vanished without a trace.