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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2020
Accounting Policies [Abstract] |
Schedule of disaggregation of revenue | For the nine months ended September 30, 2019 and 2020, substantially all of the Group’s net revenues were generated in the PRC. The following table provides information about disaggregated revenue by types:
|  | For the nine months ended September 30, |
|  | 2019 |  |  | 2020 |
|  | RMB |  |  | RMB |
Learning services |  |  | 454,980 |  |  |  | 1,423,025 |
Online courses services |  |  | 391,622 |  |  |  | 1,317,440 |
Fee-based premium services |  |  | 63,358 |  |  |  | 105,585 |
Online marketing services |  |  | 354,494 |  |  |  | 335,047 |
Learning products |  |  | 84,977 |  |  |  | 302,647 |
Total net revenues |  |  | 894,451 |  |  |  | 2,060,719 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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