Writer-director Dužan Duong made a big splash at this month’s Karlovy Vary International Film Festival with his debut Summer School, 2001. Dubbed the “first Czech-Viet” movie, it recreates aspects of the 34-year-old’s own childhood, much of which was spent around an outdoor market near the border with Germany. When we met recently the conversation took in the making of Duong’s breakout film, his own background and Czechia’s large and thriving Vietnamese community.