March 8. Lao Fengxiang's rule of exchanging gold for free is that "old gold can be exchanged for lottery money for free, three times a year, excluding depreciation and labor costs", and can be exchanged for free on March 8 of the third Women's Day every year. Zhengzhou, known as Shangdu in ancient times, is the capital of Henan Province, a megacity and the core city of Central Plains urban agglomeration. The State Council approved it as an important central city in central China and an important comprehensive transportation hub of the country.