Google has quietly opened a third office in China, highlighting its growing hardware and ad businesses in the country even as the US tech company’s signature search engine remains blocked there.

A former C.I.A. officer suspected by investigators of helping China dismantle United States spying operations and identify informants has been arrested.

Secretary of State Rex Tillerson offered a sobering assessment about the possibility of war with North Korea, saying advances in that country’s nuclear program meant the situation was “very tenuous.”

Chinese leader Xi Jinping told U.S. President Donald Trump that the two sides must work together to find solutions to trade and economic disputes, state media reported.

Alphabet Inc’s (GOOGL.O) Google will relaunch its map service in China after an eight-year absence, Nikkei reported on Monday.

Bitcoin fell 1.2 percent to $13,580.50 at 11:36 a.m. in London as China is escalating its clampdown on cryptocurrency trading, targeting online platforms and mobile apps that offer exchange-like services.

Japan’s defense minister criticized China on Monday for sailing an advanced stealthy nuclear submarine close to disputed islands claimed by Japan and China, saying the action had stoked tension.

Foreign ministers from around 20 nations gather on Tuesday to discuss how to curb North Korea’s nuclear ambitions through diplomatic and financial pressure, but China, seen as a key player in any long-term solution, will be absent.

China should be willing to loosen trade and investment restrictions if it seeks to play a leading role in globalization, International Monetary Fund First Deputy Managing Director David Lipton said.

China has urged the United States to refrain from having any official contact with Taiwan, thus harming China-US ties, after the US House of Representatives passed a bill encouraging visits between US and Taiwan officials.