
	2020		2021
	RMB’000		RMB’000
Due from third parties		452,921		337,235
Due from related parties		242,601		171,059

		695,522		508,294


	2020			2021
	RMB’000			RMB’000
Other receivables		606,452			423,028
Less: Provision for impairment		(10,590	)		(6,503	)

Other receivables, net (a)		595,862			416,525
Prepayments (b)		99,660			91,769

		695,522			508,294

(a)	Other receivables mainly represent miscellaneous deposits and receivables arising from the course of provision of non-railway transportation services by the Group.

Movements on the provision for impairment of other receivables are as follows:


	2019		2020		2021
	RMB’000		RMB’000		RMB’000
At January 1		10,590		10,590		10,590
Provision for impairment		—		—		—
Reversal of impairment loss provision		—		—		(3,660	)
Written off of impairment loss provision		—		—		(427	)

At December 31		10,590		10,590		6,503

(b)	Prepayments mainly represent amounts paid in advance to the suppliers for utilities and other operating expenses of the Group. As of December 31, 2021, the input VAT with related invoices not been received or verified amounted to RMB87,575,000 (2020: RMB94,536,000).

The carrying amounts of the Group’s prepayments and other receivables are denominated in the following currencies:


	2020		2021
	RMB’000		RMB’000
RMB		695,522		507,854
HKD		—		440

		695,522		508,294

The maximum exposure to credit risk at the reporting date is the carrying value of each class of receivable mentioned above. The Group does not hold any collateral as security.