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Summary of Principal Accounting Policies - Schedule of Disaggregation of Revenue (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥)
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | ¥ 4,326,600 | $ 678,938 | ¥ 3,324,712 | ¥ 3,413,176
One Time Commissions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,271,416 |  | 808,837 | 931,668
Recurring Service Fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 2,109,009 |  | 1,930,199 | 1,845,465
Performance Based Income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 784,193 |  | 389,525 | 113,085
Other Service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 161,982 |  | 196,151 | 522,958
Lending Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 40,226 |  | 78,772 | 376,637
Other Comprehensive Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 121,756 |  | 117,379 | 146,321
Wealth Management |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 3,211,973 |  | 2,379,456 | 2,329,853
Wealth Management | One Time Commissions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,180,900 |  | 766,246 | 928,061
Wealth Management | Recurring Service Fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,469,600 |  | 1,284,447 | 1,155,450
Wealth Management | Performance Based Income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 469,121 |  | 205,305 | 23,430
Wealth Management | Other Service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 92,352 |  | 123,458 | 222,912
Wealth Management | Lending Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 4,471 |  | 13,530 | 91,164
Wealth Management | Other Comprehensive Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 87,881 |  | 109,928 | 131,748
Asset Management Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,046,387 |  | 880,014 | 787,551
Asset Management Business | One Time Commissions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 90,516 |  | 42,591 | 3,607
Asset Management Business | Recurring Service Fees |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 639,409 |  | 645,752 | 690,015
Asset Management Business | Performance Based Income |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 315,072 |  | 184,220 | 89,655
Asset Management Business | Other Service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,390 |  | 7,451 | 4,274
Asset Management Business | Other Comprehensive Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 1,390 |  | 7,451 | 4,274
Other Financial Service Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 68,240 |  | 65,242 | 295,772
Other Financial Service Business | Other Service |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 68,240 |  | 65,242 | 295,772
Other Financial Service Business | Lending Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | 35,755 |  | ¥ 65,242 | 285,473
Other Financial Service Business | Other Comprehensive Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenues | ¥ 32,485 |  |  | ¥ 10,299

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