Historic tea houses in Hong Kong, Malaysia, and Taiwan often possess aged Tie Guan Yin—"shop treasures" (鎮店之寶) accumulated over decades. These aged oolongs, properly stored, develop prized mature flavors: deep, smooth, medicinal. They represent irreplaceable inventory: when finished, nothing can replace them. Such teas anchor a shop's reputation.
[INTERNAL LINK: Aged oolong]
