International orders began with a midnight message from an American client two years ago. After producing five design variants, Ren waited by his screen for hours without receiving any feedback. "I later realized it was simply the time difference," he recalled.

Another memorable project for him involved an American restaurant owner who initially requested four window-like plaques, each about 1.2 meters in diameter. After presenting several design drafts that showcased traditional techniques and craftsmanship, the impressed client expanded the order to six pieces.