China's Hong Kong and Macau Affairs Office (HKMAO) reposted a commentary criticising CK Hutchison's port deal with U.S. firm BlackRock as a betrayal of China, sending shares of the Hong Kong-based conglomerate sharply lower on Friday.

China’s top office on Hong Kong affairs has reposted an attack on CK Hutchison’s decision to sell its Panama Canal ports, amplifying a Beijing-backed newspaper’s warnings for the Li Ka-shing-owned conglomerate to “think twice” about which side it stands on.

Beijing signaled its displeasure over CK Hutchison Holdings’ agreement to sell its majority controlling stake in Panama ports to a BlackRock-led consortium.

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.

A Hong Kong-based company has agreed to sell most of its stake in two key ports on the Panama Canal to a group led by US investment firm BlackRock. The sale comes after weeks of complaining by President Donald Trump that the canal is under Chinese control and that the US should take control of the major shipping route.

Trump threatened to take back the canal because of what he called Chinese influence. CK Hutchison, a Hong Kong company, is selling its control in a firm that ran two ports on the canal.

Shares in Hong Kong-based conglomerate CK Hutchison fell 5 per cent on Friday after China criticised the sale of its Panama Canal ports and said it should “think twice” about the $22.8bn deal with US asset manager BlackRock.

CK Hutchison Holdings Ltd. shares plunged Friday after China’s top office on Hong Kong affairs reposted a sharp attack on the conglomerate’s decision to appease President Donald Trump by selling its stake in Panama ports.