Grand Korea Leisure Co Ltd saw its 21Q1 casino sales reach KRW6.46 billion, down 94.1 percent from the prior year period. 

That being said, March casino sales were far better than the month before, due to the closure of both its Seoul casinos that lasted from November 24 to March 15, and its Busan casino which reopened in mid February. 

Grand Korea Leisure March 2021 results (release)