Wall Street JournalOil Producers Sound Retreat From ChinaWall Street JournalBEIJING—Global oil companies are unwinding some big bets they made on China—and that is bad news for the Chinese companies, which need their know-how. Falling oil prices have force …

Wall Street JournalChina Considering Mergers Among Its Big State Oil CompaniesWall Street JournalBEIJING—China is considering forging megamergers among its big state oil companies, seeking to create new national champions able to take on the likes of Exxon …