Caoyuan mailbox

You're referring to the Caoyuan Mailbox, a famous mailbox in China!

The Caoyuan Mailbox, also known as the "Last Mailbox in China", is a historic mailbox located in Caoyuan Village, Heilongjiang Province, China. It's situated near the border with Russia and is considered the easternmost mailbox in China.

The mailbox was built in 1963 and was originally used by postal workers to collect mail from Russian postal workers who would cross the border to deliver mail to Chinese citizens. Over the years, the mailbox has become a popular tourist attraction and a symbol of the friendship between China and Russia.

Visitors can send postcards or letters from the mailbox, and the postal service will deliver them to the recipient. The mailbox has also become a popular spot for taking photos and has been featured in various media outlets.

In 2019, the Caoyuan Mailbox was officially recognized as a national cultural relic by the Chinese government, further solidifying its significance as a piece of Chinese history and culture.