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From tracing the Titanic’s Chinese sailors to diving the Great Wall, how Steven Schwankert ended up making documentaries in China

• Steven Schwankert was a teen when he decided to spend his life in China. A diver, he opened a dive school in Beijing and went wreck diving in a Mongolian lake
• His uncovering of China’s secret salvage of a 1930s British submarine led to a documentary, and that in turn to one about Chinese sailors on the Titanic