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Prepayment and other current assets (Details) $ in Thousands | Dec. 31, 2020 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | May 31, 2019 CNY (¥)
--- | --- | --- | --- | ---
Deductible VAT |  |  | ¥ 2,280,000 | ¥ 4,056,000 |
Deposits |  |  | 8,748,000 | 14,496,000 |
Prepaid rental expenses |  |  | 237,000 | 1,662,000 |
Receivables due from third-party online payment platforms |  |  | 1,126,000 | 4,755,000 |
Staff advances |  |  | 910,000 | 4,131,000 |
Prepaid promotion expenses |  |  | 55,853,000 | 54,382,000 |
Prepaid service fees |  |  | 635,000 | 4,591,000 |
Prepaid insurance fees |  |  | 4,429,000 | 3,648,000 |
Bridge Loan Receivable | [1] |  |  | 100,611,000 |
Others |  |  | 2,211,000 | 1,450,000 |
Less: provisions for prepayment and other current assets |  |  | (16,573,000) |  |
Total |  | $ 9,173 | ¥ 59,856,000 | ¥ 193,782,000 |
Longye |  |  |  |  |
Prepayment for Acquisition |  |  |  |  | ¥ 200,000,000
Bridge loan payable |  |  |  |  | ¥ 100,000,000
[1] | On May, 2019, the Company (the "Purchaser") entered into a share purchase agreement (the "Agreement") with, among other parties, Longye (the "Seller"), a company incorporated in the Cayman Islands, to acquire its entire entity interest for a total consideration of U.S.-dollar equivalent of RMB200,000,000 in the form of cash and the Company's securities in aggregate. According to the Agreement, the Purchaser shall pay RMB100,000,000 equivalent in USD as a bridge loan to the Seller. The Company has completed the acquisition on January 13, 2020, the Company has credited this bridge loan to the cash portion of the purchase price. See Note 24 for additional information.

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