楽浪郡
The "Book of Han" contains a reference to a collapsible umbrella, mentioning its usage in the year 21 AD when Wang Mang (r. 9–23) had one designed for a ceremonial four-wheeled carriage. The 2nd-century commentator Fu Qian added that this collapsible umbrella of Wang Mang's carriage had bendable joints which enabled them to be extended or retracted. A 1st century collapsible umbrella has since been recovered from the tomb of Wang Guang at Lelang Commandery in the Korean Peninsula. The Chinese collapsible umbrella may predate Wang's tomb, however. Zhou dynasty bronze castings of complex bronze socketed hinges with locking slides and bolts—which could have been used for parasols and umbrellas—were found in an archeological site of Luoyang, dated to the 6th century BC.