Transaction services fee and other related income decreased to RMB2.0 million (US$0.3 million) from RMB50.6 million for the first quarter of 2021, mainly as a result of the winding down of the transaction service business.
Sales income and others decreased to RMB4.1 million (US$0.7 million) from RMB62.5 million for the first quarter of 2021, mainly due to the decrease in sales related to the Wanlimu e-commerce platform, which we are in the process of winding down.
Total operating costs and expenses increased to RMB285.5 million (US$45.0 million) from RMB63.3 million for the first quarter of 2021.
Cost of revenues decreased by 64.7% to RMB32.1 million (US$5.1 million) from RMB91.0 million for the first quarter of 2021, primarily due to the decrease in cost of goods sold related to the Wanlimu e-commerce platform.
Sales and marketing expenses decreased by 38.5% to RMB23.1 million (US$3.6 million) from RMB37.6 million for the first quarter of 2021, primarily due to the decrease in marketing expenses related to the Wanlimu e-commerce platform.
General and administrative expenses increased by 77.6% to RMB118.4 million (US$18.7 million) from RMB66.7 million for the first quarter of 2021, primarily due to the increase in the milestone payments relating to construction contracts for the WLM Kids business which were signed in 2021. We are in the process of downsizing the WLM Kids business.
Research and development expenses decreased by 50.0% to RMB19.6 million (US$3.1 million) from RMB39.2 million for the first quarter of 2021, as a result of the decrease in staff salaries.
Provision for receivables and other assets was RMB11.9 million (US$1.9 million) for the first quarter of 2022, mainly as a result of the impairment of current assets related to the WLM Kids business compared to a reversal of RMB106.8 million regarding on-balance sheet loan book business for the same period of last year.
Impairment loss from long-lived assets was RMB113.5 million (US$17.9 million) for this quarter, as the results of the downsizing of the WLM Kids business.
As of March 31, 2022, the total balance of outstanding principal and financing service fee receivables for on-balance sheet transactions for which any installment payment was more than 30 calendar days past due was RMB154.7 million (US$24.4 million), and the balance of allowance for principal and financing service fee receivables at the end of the period was RMB230.9 million (US$36.4 million), indicating M1+ Delinquency Coverage Ratio of 1.5x.