Source text: U.S. authorities have seized 127,000 BTC, valued at $15 billion, from Teng Zhi, a Chinese-born fraudster with British and Cambodian citizenship. This marks the largest asset confiscation in the history of the U.S. Department of Justice. Teng, who led a criminal empire in Cambodia under the 'Taizi Group', was involved in online gambling, investment fraud, and money laundering. The U.S. described Teng's operations as a 'modern slavery and high-tech fraud' network. British authorities have also frozen his assets, including a £100 million office in London. Teng's criminal activities have spanned over two decades, evolving from private gaming servers in China to sophisticated fraud schemes across Southeast Asia. Target language code: es Translation instructions: This is the news article content. Please maintain the original meaning.