Unlike many of those collectors, however, he always insisted that he had a civic obligation to display his art. After a few years showing his pieces in a Jakarta cafe, in 2007 he opened the Yuz Museum nearby, making admission free of charge. Even that wasn’t enough. As his collection of works from China grew, he zeroed in on an emerging art district in Shanghai, along the Huangpo River, for an even larger venue. He settled on a portion of an old airfield, and in 2014 opened his second Yuz…