BEIJING — China's postal sector has undergone substantial improvement in the past decade, sweetening people's lives with greater convenience and higher efficiency. People working or studying far away from home can ease their nostalgia with a bite of delicacies of their hometowns such as hairy crabs from Jiangsu or lychees from Guangdong, as the country has seen drastic improvement in cold-chain logistics for fresh food, shipment efficiency as well as factory productivity. Statistics have shown the stellar performance of China's postal sector over the past 10 years. The sector's business revenue rocketed from 198.09 billion yuan (about $27.9 billion) to more than 1.26 trillion yuan in this period, with an average annual growth rate of 22.9 percent. (....)