He Ao carefully observed the silver test tube in his hand, looked at it for a long while, but couldn't find anything special about it, so he had no choice but to put the test tube away.
Actually, he hadn't planned on taking the test tube out with him, but just as he was about to leave, he suddenly remembered that the young man had easily knocked open his security door that had been welded with eight anti-theft chains, so he went back and pocketed the test tube.
Before he could secure a stable safe house, carrying it with him was the safest way, and, if he ran into trouble while outside, he could replenish it in time.
It was now a little past nine in the evening, when the pedestrian traffic wasn't high, but there were still sporadic customers coming by.
He Ao tucked the test tube into his pocket, had just gotten up to see if any customers had arrived when a blurry figure appeared under the dim street lamp in the distance.