The annual report shows that the gross profit margin of "other businesses" has soared from 38% last year to 65%, and the revenue has increased from 5.5 billion to 9.7 billion, contributing 6.3 billion in profits. It is the business that contributes the most profits except for the power battery system. What exactly is "other business"? Why did the gross profit margin soar?

CATL: Dear investors, the company's other business income mainly comes from R&D services, material sales and waste sales. As the power battery market continues to mature in recent years, consumers' recognition of new energy vehicles has increased, and the demand for differentiation has also increased. The company has received more orders for customized R&D services from customers, and the R&D fees charged to customers have increased. Thank you for your attention.