Complex sentence: Joyce retreats to Beijing with Darcy and his business associate, Su Yueming, to use the production facilities there, knowing that Attinger and Megatron have been manipulating Joyce all the time, Cade warns Joyce, who decides to go back on his deal with Attinger.
Split into simpler sentences: Joyce retreats to Beijing with Darcy and his business associate, Su Yueming, to use the production facilities there. Knowing that Attinger and Megatron have been manipulating Joyce all the time, Cade warns Joyce, who decides to go back on his deal with Attinger.