Near the main concourse in T3, Watsons is your quick health-and-beauty stop.
Watsons in Terminal T3 sits airside, so you can walk over after security instead of hunting through landside shops. Expect the usual drugstore mix: travel-size toiletries, basic medicines, skincare, and personal care items from both international and Chinese brands. Stock here skews everyday rather than luxury, which helps if you just need a 30 RMB toothpaste, a 20 RMB lip balm, or a last-minute deodorant before a long-haul out of PEK.
Prices run close to downtown Beijing Watsons branches, so you are not paying the extreme 2–3x markups you see in some duty free zones. You can pick up things like vitamin C tablets, sheet masks, and hand sanitizer in the 10–60 RMB range. Staff usually handle both cash and major cards, and the T3 location typically keeps standard airport hours, roughly from first morning departures until near the last evening flights.
Watsons in T3 is handy if your airline amenity kit falls short and you want your own shampoo, face wash, or eye drops for a 10+ hour flight. The shop also carries basics like hair ties, combs, cotton pads, and simple cosmetics, which can rescue you if a bag is checked through or a liquid got pulled at security. Snacks and drinks are limited, so use nearby T3 convenience shops for anything beyond candy or gum.
Tip: swing by Watsons in T3 before heading to more remote gates, since walking back here from the far ends of the terminal can take 10–15 minutes.