All of the accounts receivable are non-interest bearing. Based on the assessment of the collectability of the accounts receivable as of December 31, 2025 and 2024, the Company provided approximately US$5.14 million and US$4.82 million allowance for doubtful accounts, respectively, which were primarily related to the accounts receivable of the Company’s Internet advertising and related services business segment with an aging over six months. The Company evaluates its accounts receivable with an aging over six months and determines the allowance based on aging data, historical collection experience, customer specific facts and economic conditions. During the years ended December 31, 2025 and 2024, approximately US$0.22 million and US$0.89 million allowance for doubtful accounts was provided, respectively.