Throughout the entire supply chain of assessed product components, Chinese companies are still at the low end of value-added, with thin profits, and can only earn low processing fees. The report of the Asian Development Bank shows that the export price of an IPHONE (3G) is approximately 179 USD, the assembly expenditure in China is about 6.5 USD, that is, the value added of an Iphone in China is only about 3.6% of its export price. Obviously, as the world's second largest economy and world factory, the development of China's manufacturing industry still lags behind, with low technology content and low profit margins. What does this passage mean? ['The value of Apple mobile phones in China is very small.', "China has not changed the low-end status of the world's foundries.", 'Apple phone assembly is mainly processed in China.', 'China plays an important role in Apple product component supply chain.']