You know that it can be eaten raw.
Get right in there and take out one of the central leaves and taste it
Asian greens are often eaten as they develop flower buds, like broccoli. At some point perhaps, they will become bitter. Chinese cabbage is the same species as bok choy and several others. I never give up on them without a taste test and prefer the flowering stalks. The lower leaves may need to be discarded.
We are each other's harvest; we are each other's business; we are each other's magnitude and bond. ~ Gwendolyn Brooks