U.S. President Donald Trump’s national security adviser told Ukraine on Wednesday to avoid being lured into China’s orbit by what he called Beijing’s “debt diplomacy” amid a Chinese move to buy a Ukrainian aerospace giant, reports Reuters.

Asked about a pending deal for China to acquire Ukrainian aircraft engine maker Motor Sich, Bolton told reporters he did not want to discuss specific transactions and that such deals were a sovereign matter for Kiev. “We laid out our concerns about ... unfair Chinese trade practices, threats to national security we’ve seen in the United States...” he said at a news conference in Kiev.