The current and non-current portions of prepayments and other assets consist of the following:


	As of December 31,
	2022		2023		2023
	RMB		RMB		US$
Current portion:
Contract assets (i)		1,490,656		1,598,059		225,082
VAT prepayments		335,350		430,902		60,691
Prepaid licensed copyrights		136,656		19,406		2,733
Receivables from online payment agencies		369,734		534,720		75,314
Advances to suppliers		128,065		111,770		15,742
Others (ii)		142,466		99,402		14,001
		2,602,927		2,794,259		393,563


	As of December 31,
	2022		2023		2023
	RMB		RMB		US$
Non-current portion:
Prepaid licensed copyrights		2,525,282		2,382,540		335,574
Licensed copyrights prepaid assets (iii)		469,259		237,030		33,385
Long-term restricted cash (iv)		750,000		839,963		118,306
Others (ii)		120,592		58,677		8,264
		3,865,133		3,518,210		495,529

(i)

The allowance for credit losses on contract assets was RMB12,409 and RMB17,832 (US$2,512) as of December 31, 2022 and 2023, respectively. The reversals charged against the allowance was RMB2,311 for the year ended December 31, 2022. The provision charged against the allowance were RMB5,446 and RMB5,423 (US$764) for the years ended December 31, 2021 and 2023, respectively. No write-offs were charged against the allowance for the years ended December 31, 2021, 2022 and 2023.

(ii)

The allowance for credit losses on other current and non-current assets were RMB133,644 and RMB85,965 (US$12,108) as of December 31, 2022 and 2023, respectively. The provisions charged against the allowance were RMB19,529 and RMB57,115 for the years ended December 31, 2021 and 2022, respectively. The reversals charged against the allowance were RMB31,150 (US$4,387) for the year ended December 31, 2023. The write-offs charged against the allowance were nil, RMB16,688 and RMB16,529 (US$2,382) for the years ended December 31, 2021, 2022 and 2023, respectively.

(iii)

Licensed copyrights prepaid assets are recognized when the Group has yet to receive the content copyrights from the counterparty under nonmonetary exchanges but the counterparty has already received the content copyrights from the Group.

(iv)

Long-term restricted cash represents collateral to repayments of PAG Notes (Note 14).