All of the accounts receivable are non-interest bearing. The Company maintains an estimated allowance for credit losses to reduce its accounts receivable to the amount that it believes will be collected. The Company evaluates its accounts receivable on a collective (pool) basis and determines the allowance for credit loss based on aging data, historical collection experience, customer specific facts, current economic conditions and reasonable and supportable forecasts of future economic conditions. For the six months ended June 30, 2023, the Company provided approximately US$0.04 million credit losses for its accounts receivable. For the three months ended June 30, 2023, the Company reversed approximately US$0.18 million credit losses due to collection from two major clients in June 2023. For the six and three months ended June 30, 2022, the Company provided approximately US$0.33 million credit losses for its accounts receivable.