One of the 'Wong Brothers' (Nelson's younger brother, Othniel's older brother), Joshua became interested in films when he saw his older brother, Nelson Wong, who began to get involved with film production activities in Hollywood. Meanwhile, their father, Wong Siong Tek, did not agree that his son was interested in films. Joshua instead joined his brother and sister in The Great Wall company in Shanghai in the early 1920s. He had been in Java since 1928 to join Nelson, who would open a film business with Tio Tek Djin, the owner of Miss Riboet Orion. Since then, he has lived with his brother and sister, as the first Easterner to make a film in Indonesia. Almost all the stories filmed by his sister company, Batavia Motion Picture & Halimoen Film Co, come from Joshua, besides he also acts as a cameraman. When Nelson was sick since Around 1934, the Halimoen Film was continued by Joshua and Othniel. Among others, working with Albert Balink in the making of "Pareh" (1935).