The Russians and Chinese do have a motive to lie. They do not want the US to intervene with Iran. If North Korea can be made into a much more important issue, the US wont be able to logistically handle both Iran and North Korea at the same time. We would have to deal with North Korea while ignoring Iran. That would give Iran time and cover to fully develop their nukes. Iran has much more money (due to oil) then North Korea has. There was a large explosion. Both Russia and China claim it was 5 to 15 kilotons. Coincidently, both Russia and China do not want the US to intervene with Irans rush to develop nukes. In other words, it could have been smoke and mirrors and another fake October surprise for the dimwits to bash Bush. Note - This is all theoretical at this point in time.
Sorry, you lost me right there. They BOTH have infinite motive to lie and deceive. Unless you have a link proving otherwise.