"Zhongzhou" refers to Bianjing, the capital of the Northern Song Dynasty, which is now Kaifeng City, Henan Province; "March 5th" refers to the 15th of this month, which is the Lantern Festival. At that time, in order to decorate the peace, the Song Dynasty was extremely luxurious on the Lantern Festival. Compare the past and present with the Lantern Festival in Bianjing, or compare your own situation with the joy of today's tourists, so as to better describe the poet's bleak mood at present.