Gobal shipping likely to jolt trade flows for weeks,could delay shipments into the year-end holiday shopping season. 50 container ships backed up around Yantian port in China, 350,000 loaded containers stacked up on docks. Vessel queue so long liner operators diverting ships to nearby ports also swamped with containers..Bottlenecks began in May when coronavirus authorities shut down Yantian, one of the world’s busiest ports and major gateway for containerized exports like electronics, furniture, home appliances and car parts..