Xu Lin was an officer at Li Dan's official residence for a long time when he was young. After Li Dan became emperor Xu Lin was promoted to right defending general.

志主青年时期久在相王李旦府中任低职官员，相王登帝位（睿宗）后，擢为右武卫将军；

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Xu usually works long hours testing and fine-tuning motors in his lab at an old industrial complex in Shanghai.

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