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				Home to chipmaker giant TSMC and accounting for the majority of 
				the world's most advanced semiconductor manufacturing capacity, 
				Taiwan has ramped up a campaign to counter illegal poaching by 
				Chinese companies in what the island sees as a threat to its 
				chip expertise. 
 The bureau said it raided 10 Chinese companies or their R&D 
				centers which operate in Taiwan without approval earlier this 
				week. It said nearly 70 people have been summoned for 
				questioning in a joint crackdown across several cities including 
				the capital Taipei and the island's semiconductor hub, Hsinchu.
 
 "The illegal poaching of Taiwan's high-tech talent by Chinese 
				companies has badly impacted our international competitiveness 
				and endangered our national security," the bureau said in a 
				statement.
 
 It said technology is vital to Taiwan's security and urged 
				people to "stay high on alert" for such Chinese activities.
 
 The bureau did not name the companies currently being 
				investigated, adding they included integrated circuit design 
				firms and electronics parts makers.
 
 China's Taiwan Affairs Office has not responded to Reuters' 
				requests for comment on the issue.
 
 The Investigation Bureau has launched investigations into around 
				100 Chinese companies suspected of illegally poaching technology 
				talents, a senior bureau official told Reuters last month.
 
 China's scramble for chip engineering talent has intensified 
				amid Beijing's goal of achieving self-reliance in advanced 
				chips, especially after a trade war with the former Trump 
				administration in the United States.
 
 Taiwanese law prohibits Chinese investment in some parts of the 
				semiconductor supply chain, including chip design, and requires 
				reviews for other areas such as chip packaging, making it very 
				difficult for Chinese chip companies to operate on the island 
				legally.
 
 In March, the bureau raided eight Chinese companies aimed at 
				countering what it said was "the Chinese Communist Party's 
				illegal activities of talent-poaching and secret-stealing".
 
 (Reporting By Yimou Lee. Editing by Jane Merriman)
 
 
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