The ports, with their powerful labour unions, limited working hours and outdated technology, must increase investment and productivity if further disruption is to be averted, executives and analysts warned.

• 高管和分析师警告说,这些港口工会势力强大、工时限制严格且技术过时,要想避免再次出现作业中断,必须增加投资并提高劳动生产率。