Nowadays, people don't send letters to one another when they want to catch up. You may get holiday or birthday cards from your parents, grandparents or other family members and friends, but for the ...

A postal worker packs mail at the township branch of China Post in Chunhua township of Hunchun city, Northeast China's Jilin province, Feb 19, 2019. [Photo/Xinhua] The traditional six-digit postal ...