** China has recently struck a sterner tone in its rhetoric, suggesting that a resumption of talks, aimed at ending the 10-month trade war between the world’s two largest economies, was unlikely to happen soon. President Donald Trump said in an interview aired on Sunday night that the tariffs on Chinese goods were causing companies to move production out of China to Vietnam and other countries in Asia. ** The smaller Shenzhen index ended down 0.8% and the start-up board ChiNext Composite index was weaker by 0.6%. ** CSI300’s financial sector sub-index closed lower by 0.1%, the consumer staples sector was down 2.3%, the real estate index fell 0.7%, and the healthcare sub-index declined 1.9%. ** At the close, the Shanghai Composite index was down 0.4% at 2,870.60, while the blue-chip CSI300 index was lower by 0.9%. HONG KONG, May 20 (Reuters) - The Chinese stock market ended lower on Monday as trade tensions between China and the United States dragged on, with the focus being fixed on the sticking point of technology transfer. * Chinese cenbank vows stability in yuan, fine-tune of policy * Huawei hit by Google suspension Trump boasts tariff impact * Shanghai shares down 0.4%, blue-chips down 0.9%