I soo wish Ning Jian beeing their son. That would be hilarious. I mean he even looks like a mixture of our main couple. And we didn't see his adult form before. Only that he was black haired and somewhat green eyed as a baby (unfortunately not as green as Ning Jian).

What's the chance?

Finally!

I can show you the world 🎶

We know from the first chapter that Woo will leave him eventually, turn white haired, get cured in the process,  and somehow become a masked enemy of Kang-Oh.

And we know that Kang-Oh will regain his memories without loosing himself contrary to Master fears.

The question is: How many chapter until we are at chapter 1? Or will chapter one be the tragic end?

Why do I keep feeling that Lu Lang is already healed and only pretending to still need his wheelchair?

I don't understand. Ch 1 speaks of the event shown in ch 15&16... I don't see any connection to that in this chapter?

My theory based on what we saw until now:
The master and the head of a rightous clan were a pair and defeated the blood clan. But afterwards, he left the master and married a woman who gave birth to "Woo". 
I suspect Kang-Oh to be the master's son who somehow ended up as a servant to "Woo" when he was a kid. For reasons unknown, "Woo" was in great danger and Kang-Oh somehow saved his life by thinking of trading his own. But both survived and "Woo" begged master to save Kang-Oh by probably giving up his martial arts and getting crippled as the price. As Kang-Oh lost his memory, he perceives master as his only saviour. Maybe master is afraid that, when Kang-Oh finds out about the sacrifices "Woo" made, he will turn his back at him and leave him as well. 

I don't know the chapters after this nor do I know the story. It's just my interpretation of what was said until now. So I can be completely wrong.