China’s top office on Hong Kong issues reposted a sharp attack on CK Hutchison Holdings Ltd. for agreeing to sell a controlling stake in Panama ports, warning companies to be very careful about which “side they should stand on.

The deal comes after U.S. President Donald Trump repeatedly threatened to take control of the Panama Canal and end what he sees as China’s influence over the waterway critical to global trade.

Hong Kong tycoon Li Ka-shing’s company CK Hutchison Holdings, which recently sold its Panama Canal ports, should think twice about which side it wants to stand with, according to a scathing newspaper commentary posted by Beijing’s top office for the city’s affairs on its website.