China's move to place export controls on two metals that are vital to key technologies appears to have raised concerns in the United States.
Treasury Secretary Janet Yellen voiced those concerns in a meeting with US businessmen operating in China on Friday.
Yellen began a four-day visit to China to focus on efforts to ease tensions between the world's two largest economies.
Earlier this week, China's Ministry of Commerce announced that starting August 1, companies wishing to export the two metals for semiconductor manufacturing will need to apply for a license.
Yellen said the US Treasury is still assessing the impact of the move, but at the same time it is reminding her of the importance of building a resilient and diverse supply chain.
Even so, if you look back, Beijing's actions are not as big as those done by America, which has imposed various sanctions on the country to restrict its technological development.
That includes sweeping export controls that took effect in October and restricts the ability of US businesses to sell certain advanced computing semiconductors or related manufacturing equipment to China.
Meanwhile, China has redoubled its efforts to attract foreign investment and business as a step to rebuild its economy affected by the pandemic.
