The following is a summary of prepayments and other current assets:


	December 31, 2018		December 31, 2019		December 31, 2020
	RMB in thousands
Prepayments for revenue sharing cost*		462,883		542,971		782,518
Prepayments for content cost		130,619		226,500		195,175
Prepayments for sales tax		80,487		157,244		202,025
Interest income receivable		26,812		93,688		6,396
Inventories, net		55,032		69,914		160,006
Loans to investees or ongoing investments		84,075		64,463		187,672
Prepayments of marketing and other operational expenses		33,198		53,246		64,068
Prepayments /receivables relating to jointly invested content		44,951		43,838		28,664
Deposits		20,447		26,301		51,661
Prepayments to inventory suppliers		12,901		9,058		19,970
Others		39,446		28,678		67,632

Total		990,851		1,315,901		1,765,787

App stores retain commissions on each purchase made by the users through the App stores. The Group is also obligated to pay ongoing licensing fees in form of royalties to the third-party game developers. Licensing fees consist of fees that the Group pays to content owners for the use of licensed content, including trademarks and copyrights, in the development of games. Licensing fees are either paid in advance and recorded on the balance sheets as prepayments or accrued as incurred and subsequently paid. Additionally, the Group defers the revenue from licensed mobile games over the estimated average playing period of paying players given that there is an implied obligation to provide

on-going

services to

end-users.

The related direct and incremental platform commissions as well as game developers’ licensing fees are deferred and reported in “Prepayments and Other Current Assets” on the consolidated balance sheets.