What can fashion learn from Taiwan's trendy Insta-famous grandparents?

Chang Wan-ji, 83, and his wife Hsu Sho-er, 84 are Instagram's latest fashion stars. They hope to use their new social media clout to promote "environmental fashion". Photo: Instagram/@wantshowasyoung

Taiwan's trendiest couple these days are neither young celebrities nor teen influencers – they are an octogenarian duo who run a mom-and-pop laundry service and have become an online sensation by modelling abandoned clothes.

Chang Wan-ji, 83, and his wife Hsu Sho-er, 84, have racked up nearly 600,000 followers on Instagram over the last month as their attitude-filled fashion portraits went viral. They have even been featured in the Taiwanese edition of Vogue and Marie Claire.