Stardust Solutions says its tiny spheres can reflect the sun’s rays without harming people or the environment. Critics say private companies have no business altering Earth’s atmosphere.

One of the most prominent activists for Mexico’s disappeared recently found the remains of one missing son. Now she has turned her attention to finding the other.

Xi Jinping, China’s leader, told President Trump that Taiwan, if handled poorly, could lead to a clash with the United States. The two leaders are also expected to discuss trade and the Iran war at the two-day summit.

President Trump shook hands with President Xi Jinping of China at the start of a two-day summit in Beijing on Thursday. They are expected to discuss trade, Iran and Taiwan.

At least one person was killed and dozens were wounded in a drone and missile strike, the latest in a series of attacks since a three-day truce expired on Monday.

Beijing approved export licenses for hundreds of American slaughterhouses to resume beef shipments, ending a 15-month ban.

China’s leader, Xi Jinping said relations between the two countries could enter an “extremely dangerous place” if Mr. Trump ignored China’s demands over Taiwan.

The Temple of Heaven and Great Hall of the People embody distinct parts of China’s history, which Xi Jinping has sought to underscore while hosting state visits.