Alex was surprised by Aunt Mia's explanation about the Dark Union.
'So the Dark Union was like a powerful terrorist organisation that shouldn't be provoked; they would kill anyone who is caught investigating them, and even people close to that person might be affected.' Alex noted in his heart.
He wanted to ask more, but Mia advised him to drop the matter, if possible; she hoped that he would never have to come across the Dark Union in his life.
Since Mia was unwilling to continue on the matter, Alex decided to forget about it for the time being. He would investigate on his own later.
He was confident that no one would be able to figure out that he was Mr Chen, so he wasn't afraid of the Dark Union, knowing that they were being investigated by his second identity.
As for the Dark Union coming to him because he was investigating them, Alex felt it would be the best outcome.
That would save him all the trouble of searching for them.