Quote Originally Posted by Robert7 View Post
I am already registered for many months, but where is the thread for this Challenges Series?

Edit:
Thx, Xuyongchen. This is because I could not find it.

Yes, you could not find it now We do not have any threads about them. But we will have these threads one by one and I will post them. So, you could choose the challenges that you like (you may not need to join all of them, since you may want to join some other challenges which have the same time of ours).