increased by $6,726,164 to $15,553,783 for the year ended December 31, 2023 from $8,827,619 for the year ended December 31, 2022. As a result, operating profit as a percentage of revenue decreased to (90.7)% for the year ended December 31, 2023 from (12.6)% for the year ended December 31, 2022.
Finance income
Our finance income decreased by 96.8% to $134,124 for the year ended December 31, 2023, compared to $4,233,034 for the year ended December 31, 2022, mainly because there was no recognition of gain from discharge of indebtedness for the year ended December 31, 2023. During the year ended December 31, 2022, there was a gain from discharge of indebtedness recognized from conversion of convertible bonds to equity which occurred in 2022. For the year ended December 31, 2023, our finance income consisted primarily of gain from foreign currency translation of $78,600, gain foreign currency transaction of $41,881, and interest income of $13,643. For the year ended December 31, 2022, our finance income consisted primarily of gain from foreign currency translation of $74,596, gain from discharge of indebtedness of $4,079,520, interest income of $39,966, and gain from foreign currency transaction of $38,952.
Finance costs
Our finance costs increased by 187.8% to $3,226,024 for the year ended December 31, 2023, compared to $1,120,831 for the year ended December 31, 2022, mainly due to a significant increase in interest expense of $1,546,792. The main reasons for the increase in interest expenses are the rise in interest rates and the new borrowing of $4,358,369 in long-term borrowings at the end of 2022. The interest rate related to the borrowings was increased from 4.9% during the year ended December 31, 2022 to 11.23% during the year ended December 31, 2023.
For the year ended December 31, 2023, our finance costs consisted primarily of interest expense of $2,466,238, change in fair value of derivative warrant liabilities of $504,587, loss from foreign currency translation of $127,190, loss from valuation of CB of 103,342 and loss from foreign currency transaction of $24,667. For the year ended December 31, 2022, our finance costs consisted of interest expense of $919,446, loss from foreign currency translation of $133,181 and loss from foreign currency transaction of $68,204.
Other income
Our other income decreased by 96.1% to $198,778 for the year ended December 31, 2023, compared to $5,199,803 for the year ended December 31, 2022, mainly due the decrease in miscellaneous income by $5,140,807. Amount for the year ended 2022 includes $5,144,961 of recognition of gain from goods returned from previous year’s sales.
For the year ended December 31, 2023, our other income consisted of reversal of allowance for bad debts of $136,111, $57,157 miscellaneous income resulting from the disposal of scrap materials, income from disposal of tangible assets of $4,682 and dividend income of $827.
For the year ended December 31, 2022, other income consisted of miscellaneous income of $5,197,964 and dividend income of $1,839.
Other expenses
Our other expenses decreased significantly by 282.0% to $57,952,751 for the year ended December 31, 2023, compared to $15,169,616 for the year ended December 31, 2022, mainly due to Nasdaq listing expense of $26,884,034 and reverse acquisition expense caused by De-SPAC transaction of $18,736,326.
For the year ended December 31, 2023, other expenses consisted of $26,884,034 Nasdaq listing expense, reverse acquisition expense of $18,736,326, other allowance for other receivables and prepayments of $4,865,907, impairment loss from intangible assets of $4,070,331, miscellaneous loss of $440,331, loss from
112