BEIJING (Reuters) - China on Monday called on "relevant parties" to avoid action that would escalate tension on the Korean Peninsula after the United States imposed more sanctions on North Korea last week. Foreign ministry spokeswoman Hua Chunying made the remarks at a daily news briefing. The sanctions came in the wake of a cyberattack on Sony Pictures Entertainment, which the White House has said was supported by the reclusive country. The U.S. ...