Peace between the Koreas `` serves the common interests of all parties , '' an official says . Yoshihiko Noda visits Beijing for the first time as Japanese prime minister . - The U.S. State Department issues a travel warning to Americans traveling in South Korea and China due to North Korea's nuclear test. Kim 's death was announced by Pyongyang on December 19 and has put the region on edge , as the world waits to see how North Korea 's succession will play out . Both countries will also use their own currencies -- not the U.S. dollar -- in bilateral trade .
Peace between the Koreas `` serves the common interests of all parties , '' an official says . Yoshihiko Noda visits Beijing for the first time as Japanese prime minister . - The U.S. State Department issues a travel warning to Americans traveling in South Korea and China due to North Korea's nuclear test. Both countries will also use their own currencies -- not the U.S. dollar -- in bilateral trade .