Beijing’s retaliation came after the White House ratcheted up its tariff on Chinese goods to 125 percent, on top of an existing 20 percent tax.

© Jon Cherry for The New York Times

Beijing’s retaliation came after the White House ratcheted up its tariff on Chinese goods to 125 percent, on top of an existing 20 percent tax.

A deepening trade war could further weaken ties between the superpowers. The effects will reverberate everywhere.

© Gilles Sabrié for The New York Times

A deepening trade war could further weaken ties between the superpowers. The effects will reverberate everywhere.

Plus, the theme park wars heat up.

President Trump’s policies are straining trade ties and challenging a long-held truth in China about the centrality of the U.S. market.

Beijing’s threat to stop a tycoon’s sale of his ports business has dealmakers wondering if they can still operate without political interference.

The city’s chief executive said a deal between the Hong Kong conglomerate CK Hutchison and BlackRock, a major American investment firm, requires “serious attention.”

Elon Musk, the company’s chief executive, is fast losing out to Chinese electric carmakers in Tesla’s second-most-important market.

The country’s top leaders set an optimistic growth target but gave few hints of how to achieve it as their export-led strategy is challenged by rising tariffs on Chinese goods.

In a sign it is willing to go further in responding to President Trump’s tariffs, Beijing blocked more American companies from importing goods into China.

China is still cautiously trying to figure out what Trump wants. The president has threatened big tariffs in response to the inaction.

Business owners told The Times that President Trump’s tariffs could lead to higher costs and expressed frustration at the sudden uncertainty about policy.