A World Trade Organization arbitrator will review Friday a Chinese request to impose more than $7 billion (nearly 6 billion euros) in annual sanctions on the United States over anti-dumping practices, a Geneva trade official said. The decision to appoint an arbitrator was reached during a special meeting of the WTO Dispute Settlement Body convened to discuss developments in a five-year-old trade dispute between the world’s top two economies. Beijing had already warned earlier this month that it planned to ask the global trade body during the meeting for permission to impose $7.04 billion in annual trade sanctions on Washington in the case.