Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Chinese Firm Offers to Replace Faulty Test Kits Sold to Spain Martin Arostegui A Chinese company offered Friday to replace thousands of faulty coronavirus test kits after Spanish health authorities -- desperate for materials to cope with the world's second highest COVID-19 death toll -- complained they did not work as promised. China has sold face masks and other medical equipment through a series of personal contacts with Spanish authorities, including discussions between chief executives of Chinese tech giant Alibaba and Spain's King Felipe. But the first shipment of 640,000 test kits was found to have "insufficient sensibility" to reliably identify infected patients, according to Health Minister Salvador Illa, who announced Thursday that 58,000 kits had been returned. .