Prepayments and other current assets (Tables)

12 Months Ended

Dec. 31, 2022

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Prepayment and Other Current Assets

Prepayments and other current assets consist of the following:


		As of December 31,
		2021		2022
		RMB		RMB		US$
Receivables on behalf of third party advertising companies	(i)		12,599		—		—
Prepaid service fee			11,410		15,340		2,224
VAT and other surcharges			5,618		2,552		370
Investment in a convertible loan			4,221		4,632		672
Loans granted to equity investees	(ii)		3,000		3,000		435
Office rental deposit			919		199		29
Prepaid media cost			551		900		130
Receivables from sales of shares on behalf of employees			180		73		11
Others			8,172		3,705		536

Total prepayments and other current assets			46,670		30,401		4,407

(i)	Starting from January 1, 2021, the Company has fully exited the Targeted Marketing business and this balance represents the receivables the Company acts as agent and collects on behalf of third party advertising companies for targeted marketing related services.

(ii)

For the years ended December 31, 2020, 2021 and 2022, the Company recognized impairment charges on loans granted to equity investees of RMB4,500, RMB528 and RMB705 (US$102). The Company evaluates the impairment of the equity investments without readily determinable fair value along with loans the Company granted to those investees.