Cost of Revenues	2017	Cost of Revenues	2018	2019	2020
Revenue-sharing costs	926,315	Revenue-sharing costs	1,630,881	2,494, 416	4,366,490
Revenue-sharing costs	48.3%	Revenue-sharing costs	49.8%	44.6%	47.7%
Content costs	261,534	Content costs	543,009	1,001,600	1,875,546
Content costs	13.6%	Content costs	16.6%	17.9%	20.5%
Server and bandwidth costs	468,903	Server and bandwidth costs	618,737	919,753	1,141,257
Server and bandwidth costs	24.4%	Server and bandwidth costs	18.9%	16.5%	12.5%
Staff costs	128,268	E-commerce and others	480,866	1,171,904	1,775,507
Staff costs	6.7%	E-commerce and others	14.7%	21.0%	19.3%