Chinese banks have stopped financial transfers to North Korea under government orders as part of sanctions imposed for Pyongyang’s nuclear test, bank employees said Friday, in a possibly serious blow to the country’s frail economy. China is North Korea’s main trading partner and aid donor, and the disruption of financial transfers is a forceful expression of Beijing’s anger at the Oct. 9 nuclear test by its isolated ally. It is a break with China’s earlier reluctance to use economic pressure against the North for fear its ally’s government might collapse. Full Story