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.