My grandparents in Toronto fancy buying unmarred Gai Lan and Choy Sum. They tried Loblaws/T&T (same company, so same supplier?), Sunny Supermarket; but their Chinese vegetables are too shoddy. They're yellowish, have black smudges or streaks, or have holes (chewed by bugs?) or bugs themselves.
My grandparents noticed Loblaws/T&T's packaging blazons Mexico as the origin, so they fancy seeing if Chinese vegetables grown in Canada-US may be less marred?