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Investments | 12 Months Ended
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Dec. 31, 2022
Investments |
Investments | 4. Investments The following table summarizes the Group’s investment balances: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31,
​ | ​ | (Amount in Thousands)
​ |  | 2021 |  | 2022 |  | 2022
​ | ​ | RMB | ​ | RMB | ​ | US$
Short-term investments |  |  |  |  |  |
Held-to-maturity investments |  | 29,288 |  | 20,660 |  | 2,995
Available-for-sale investments |  | 13,805 |  | 14,941 | ​ | 2,166
Trading debt securities |  | 14,804 |  | 207,670 | ​ | 30,109
Equity securities measured at fair value |  | 7,925 |  | 5,265 | ​ | 763
Investments held by consolidated investment funds measured at fair value | ​ | 26,981 | ​ | 67,443 | ​ | 9,780
Total short-term investments |  | 92,803 |  | 315,979 | ​ | 45,813
Long-term investments |  |  |  | ​ |  | ​
Other long-term investments |  |  |  | ​ |  | ​
- Investments measured at fair value |  | 376,957 |  | 631,662 | ​ | 91,582
- Investments measured at cost less impairment |  | ​ | ​ | ​ | ​ | ​
- Private equity funds products |  | 96,302 |  | 27,207 | ​ | 3,944
- Other investments measured at cost less impairment |  | 114,986 |  | 40,475 | ​ | 5,868
Total other long-term investments |  | 588,245 |  | 699,344 | ​ | 101,394
Investments held by consolidated investment funds measured at fair value | ​ | 80,327 | ​ | 74,751 | ​ | 10,838
Total long-term investments |  | 668,572 |  | 774,095 | ​ | 112,232
Total investments |  | 761,375 |  | 1,090,074 | ​ | 158,045
​ Held-to-maturity investments consist of investments managed by the Group that have stated maturity and normally pay a prospective fixed or floating rate of return, carried at amortized cost. The Group recorded investment income on these products of RMB10,331, RMB1,568 and RMB383 for the years ended December 31, 2020, 2021 and 2022, respectively. The gross unrecognized holding gain was RMB5,087, RMB612 and RMB582 as of December 31, 2020, 2021 and 2022, respectively. No credit loss related to held-to-maturity investments was recognized for the years ended December 31, 2020, 2021 and 2022. Available-for-sale investments consist of investments managed by the Group that have stated maturity and normally pay a prospective fixed rate of return, carried at fair value. All of available for sale investments as of December 31, 2022 of RMB14,941 will mature in 2023. Changes in fair value of the available-for-sale investments, net of tax, for the years ended December 31, 2020, 2021 and 2022 was RMB(4), RMB243 and nil respectively, recorded in the other comprehensive (loss) income, of which RMB(775), RMB243 and nil was realized and reclassified from other comprehensive (loss) income to investment (loss) income in the consolidated statements of operations for the years ended December 31, 2020, 2021 and 2022. The amortized cost of the available-for-sale investments as of December 31, 2020, 2021 and 2022 was RMB14,135, RMB13,805 and RMB14,941, respectively. There was no investment with realized or unrealized losses during the years ended December 31, 2020, 2021 and 2022. No credit loss was recognized for the years ended December 31, 2020, 2021 and 2022. The consolidated investment funds are, for GAAP purposes, investment companies and reflect their investments at fair value. The Group has retained this specialized accounting for the consolidated funds in consolidation. Accordingly, the unrealized gains and losses resulting from changes in fair value of the investments held by the consolidated investment funds are recorded in the consolidated statements of operations as investment income. Other long-term investments consist of investments in several private equity funds as a limited partner with insignificant equity interest and equity investments of common shares of several companies with less than 20% interest. The Group elects to measure these investments at fair value or at cost, less impairment. The Group recognized impairment loss related to investments measured at cost, less impairment, of RMB115,100, RMB10,000 and nil in investment income (loss) for the years ended December 31, 2020, 2021 and 2022, respectively. The impairment in 2020 was due to the deteriorating operation of a single investment and measured as the difference between the investment’s carrying amount and the fair value estimated based on a quotation offered from an unrelated third party accepted by the Group. In 2021, the negotiation was suspended due to the continued deterioration of underlying investment, and the Group impaired the investment to nil with an impairment loss of RMB10,000 for the year ended December 31, 2021.

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- Definition The entire disclosure for investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -URI https://asc.fasb.org/topic&trid=75115024 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -URI https://asc.fasb.org/topic&trid=2197064 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI https://asc.fasb.org/topic&trid=2196965 + Details
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