@article{202103.0320,
	doi = {10.20944/preprints202103.0320.v1},
	url = {https://doi.org/10.20944/preprints202103.0320.v1},
	year = 2021,
	month = {March},
	publisher = {Preprints},
	author = {Ada Tsan Qin},
	title = {Exploring the Air Pollution Control Direction of Two Typical Cities, Beijing and Wuhan, from the Air Pollution under Emergency Responses during COVID-19},
	journal = {Preprints}
}