NINGBO, June 28, 2016 (Xinhua) -- Workers sort out outgoing mail packages at the international mail exchange office in Ningbo, east China's Zhejiang Province, June 28, 2016. The office was put into use on Tuesday here, which made international mails be cleared by the customs more convenient as cross-border businesses thrived in recent years. (Xinhua/Huang Zongzhi)
