v3.26.1
Long-term investments, net (Tables)
 12 Months Ended
Dec. 31, 2025
Long-Term Investments [Abstract]  
Schedule of long-term investments
As of December 31,
20242025
US$US$
Equity method investments, net 1,436 1,163 
–SiEngine Technology Co., Ltd. (“SiEngine”)
— — 
–Smart Automobile Co., Ltd. (“Smart”)
— — 
–Shenzhen U Chance Technology Co., Ltd. (“U Chance”)
973 1,163 
–ACO Tech Sdn. Bhd. (“ACO Tech”)
463 — 
Equity securities 728 17,507 
Available-for-sale debt investments— 42,833 
Total long-term investments, net2,164 61,503 
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 year indicated:

US$
Balance at December 31, 202442,979 
Unrealized loss(143)
Foreign currency translation adjustments(3)
Balance at December 31, 202542,833 
Schedule of fair value of available-for-sale debt investments The fair value of available-for-sale debt investments as of December 31, 2025 were estimated with the following key assumptions:
As of December 31,
2025
Risk-free interest rates (i)
1.38% - 3.55%
Bond Yield (ii)6.07 %
___________________________
i.The risk-free interest rates were estimated based on the yield to maturity of U.S. treasury bonds and 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 bond yields were estimated based on the market yield of comparable bonds with similar credit rating.