China’s Skyrizon company has notified Ukraine’s Justice Ministry that it intends to start international arbitration against Ukraine over access to the Motor Sich aircraft engine factory, reports UNIAN. Noting that it bought 56% of Motor Sich shares in 2016, Skyrizon is demanding $3.5 billion in damages for being unable to enter the factory complex for the last four years. Skyrizon argues that moves by Ukraine’s State Security office and Anti-Monopoly Committee violate the China-Ukraine investment protection treaty adopted by both countries in 1992.