Core Viewpoint - The recent increase in accounts receivable and inventory for Xinlei Co., Ltd. is attributed to changes in the sales model and expansion of production capacity to meet market demand [1] Group 1: Accounts Receivable - The growth in accounts receivable over the past three years is primarily due to a shift in the sales model for the company's HVAC products [1] - Some customers are government departments, which has resulted in slower payment compared to normal sales contracts [1] Group 2: Inventory - The increase in inventory is mainly due to the commissioning of new factories and production lines [1] - The company has expanded production capacity to meet market demand, leading to higher levels of raw material and finished goods inventory [1]