Complex sentence: He joined a local affiliate of 2003 Nordpool Consulting of Germany as a consultant, and in 2006 joined the Chinese chapter of PEN International, through which he became acquainted with professionals in Hong Kong International PEN.
Split into simpler sentences: He joined a local affiliate of Nordpool Consulting of Germany as a consultant in 2003. In 2006, Gui joined the Chinese chapter of PEN International, through which he became acquainted with professionals in Hong Kong International PEN.