THERE was no fragrant smell of incense, nor was there a boisterous barongsai dragon dance performance. But, on that Saturday night two weeks ago, the gallery space at Langgeng Art Foundation in Yogyakarta was packed with ethnic Chinese who live in Yogyakarta. They were not invited to learn how to become collectors of paintings, many of whom are indeed ethnic Chinese, but rather they were invited to witness how Oh Hong Boen, who against his will c