Bok choy, celery, lettuces, leeks, and many cabbages grow right at ground level. Any wind or rain could blow dust, dirt, sand, or even animal fecal matter in between the leaves/stalks. So, you need to wash them.
This goes for all vegetables - the farmer does not seal the field in a plastic bag, so there can be 'foreign objects'.
Wai Choy's birth name is Wai Luon Choy.
The English term for "yau mak choy" is typically "choy sum" or "choy sum lettuce."
Wai Choy is 6'.
Bok choy is a vegetable; it's a type of cabbage.
CHOY-FM was created in 2001.
CHOY-TV was created in 197#.
La Choy was created in 1922.
Wayson Choy was born in 1939.
Herbert Choy died in 2004.
Herbert Choy was born in 1916.
Tony Choy was born in 1970.
Yes, you can freeze bok choy for later use. Wash and chop the bok choy, blanch it in boiling water for a few minutes, then cool it in ice water before draining and freezing in airtight containers. Thaw and use in stir-fries or soups.