v3.26.3
Long-term investments, net (Tables)
 6 Months Ended
Jun. 30, 2026
Long-Term Investments [Abstract]  
Schedule of long-term investments
As of December 31,As of June 30,
20252026
Equity method investments, net1,163 737 
–SiEngine Technology Co., Ltd. (“SiEngine”)
— — 
–Shenzhen U Chance Technology Co., Ltd. (“U Chance”)
1,163 — 
–ACO Tech Sdn. Bhd. (“ACO Tech”)
— — 
–Hangzhou Fuyang Zeji Qushi Equity Investment Fund Partnership (Limited Partnership) (“Fuyang Fund”)
— 737 
Equity securities17,507 19,642 
Available-for-sale debt investments42,833 41,250 
Long-term investments, net61,503 61,629 
Schedule of reconciliation of the Level 3 fair value measurement of available-for-sale debt investments
The following table provides information about the reconciliation of the Level 3 fair value measurement of available-for-sale debt investments for the six months ended June 30, 2026.:

US$
Balance at December 31, 202542,833 
Unrealized loss(2,799)
Foreign currency translation adjustments1,216 
Balance at June 30, 202641,250 
Schedule of fair value of available-for-sale debt investments The fair value of available-for-sale debt investments as of June 30, 2026 were estimated with the following key assumptions:
As of June 30, 2026
China risk-free interest rate (i)
1.29%
U.S. risk-free interest rate (ii)4.14 %
Bond Yield (iii)7.62 %

i.The risk-free interest rate was estimated based on the yield to maturity of China Government Bond for a term consistent with the expected term of available-for-sale debt investments in effect at the valuation date.
ii.The risk-free interest rate was estimated based on the yield to maturity of U.S. Treasury Bonds for a term consistent with the expected term of available-for-sale debt investments in effect at the valuation date.
iii.The bond yield was estimated based on the market yield of comparable bonds with similar credit rating.