C94 Cryptology

I nodded towards Lee Shun: "Sorry, Boss Lee, I didn't tell you about my past, because …"

Before I could finish my words, Lee Shun waved his hand at me, "Hey, brother, there's no need to explain. I'm not blaming you, I'm just curious, you have so much knowledge and skills, how did you end up like this, and you're even willing to fight and kill with me … There must be some secret behind it