Financial Performance - Total revenue increased by 23.6million,or31.199.4 million from 75.8millionin2023,drivenbyhigherdemandforInPandGaAswafersubstrates[288].−Grossprofitincreasedby10.5 million in 2024, resulting in a gross margin of 24.0% compared to 17.6% in 2023 [297]. - Revenue from customers in China increased by 41.1% in 2024, primarily due to higher demand for GaAs, InP, and Ge wafer substrates [293]. - Revenue from customers in Taiwan surged by 63.0% in 2024, primarily due to increased demand for GaAs and InP wafer substrates [293]. - Revenue from North America increased by 14.9% in 2024, primarily due to higher demand for InP wafer substrates [293]. Expenses and Costs - Research and development expenses rose by 2.5million,or20.414.5 million in 2024, mainly due to higher development costs for GaAs and InP wafer substrates [301]. - Selling, general and administrative expenses increased by 1.3million,or5.724.1 million in 2024, attributed to higher legal and professional service expenses [299]. - Interest expense, net decreased by 187,000,or12.21.34 million in 2024 compared to 1.53millionin2023,whileitincreasedby456,000, or 42.6%, from 1.07millionin2022[303].AssetsandLiabilities−Thecompanyrecordedaccountsreceivablenetbalanceof25.6 million as of December 31, 2024, compared to 19.3millionin2023,reflectinganincreaseofapproximately32.1432,000 during 2024, while it increased by 272,000in2023,indicatingashiftincreditriskassessment[266].−AsofDecember31,2024,thecompanyhadaninventoryreserveof24.1 million for excess and obsolete inventory, up from 21.9millionin2023,representinga10.1451,000 in 2024 from 703,000in2023,areductionofapproximately35.820.7 million and 17.5millionfortheyears2024and2023,respectively[309].−Provisionforincometaxesincreasedby974,000, or 608.8%, to 1.1millionin2024from0.2 million in 2023, while it decreased by 2.0million,or92.72.2 million in 2022 [308]. Cash Flow and Financing - Net cash used in operating activities was 12.1millionin2024,primarilyduetoanetlossof11.8 million and a net change in operating assets and liabilities of 11.7million[315].−Totalcash,restrictedcash,andcashequivalentsdecreasedby16.3 million in 2024, ending the year at 33.8million[313].−Netcashusedininvestingactivitieswas4.4 million in 2024, primarily for property, plant, and equipment [318]. - The company has no current intentions to distribute earnings to investors under its corporate structure, maintaining cash management policies for funding between subsidiaries [330]. - The company reported net cash provided by financing activities of 38.0millionfor2022,with53.1 million from short-term loans in China and 2.2millionfromcapitalincreasesinsubsidiaryshares[323].InvestmentsandEquity−Thecompanysoldapproximately7.2849 million as part of its IPO process on the STAR Market [331]. - The IPO application for Tongmei was accepted for review by the Shanghai Stock Exchange on January 10, 2022, and approved on July 12, 2022 [332]. - Dividends received from PRC subsidiaries were approximately 2.4million,4.3 million, and 2.9millionfortheyearsendedDecember31,2024,2023,and2022,respectively[329].−Minorityinvestmentsunderthefairvaluemethodtotaled0.6 million as of December 31, 2024, unchanged from 2023, while investments under the equity method increased from 12.5millionin2023to14.1 million in 2024 [354]. Regulatory and Economic Environment - The company faced significant economic challenges due to escalating trade tensions, with U.S. tariffs on imports from China increasing to 70% [286]. - The company anticipates potential delays in export permit processing for indium phosphide substrates due to new regulations, impacting future operations [286]. - Approximately 92% of the company's revenue in 2024 came from customers located outside of North America [292]. Miscellaneous - The company has no off-balance sheet financing arrangements or special purpose entities established [341]. - The company has committed to a total investment of approximately 90millioninDingxing,China,includingcashforlandandbuildings,equipment,andlocalemployment[344].−ThecompanyhasinstitutedaforeigncurrencyhedgingprogramtomitigateforeignexchangeexposurerelatedtoJapaneseyen,whichmayalsobeappliedtotheChineserenminbiinthefuture[351].−AregistrationstatementwasfiledwiththeSECtoofferupto60 million in various securities for working capital and potential acquisitions [335].