The canal in Nicaragua might be under the financial support of China's own international bank
Russia is currently recovering from the boycott and its governmental and private corporations found the way to increase their national productivity to the point of becoming more economically solid than before, when importing goods was the greatest market.
China and Russia signed trade contracts to use their own currencies for trading between these two countries, rejecting the dollar for this purpose.
The Russian ruble has become more stronger.
Now, the Chinese yen will also have more economical influence in that pert of the world, and there is a possibility that will enter to Europe as another international currency for trading purposes.
This is a big trouble for the US.
The best to prepare against inflation due to the return of "unused and rejected dollars" is increasing the internal productivity... following the example given by Russia.
The dollar must circulate and can't stay floating inside the US borders in order to continue its power and influence.
The strategy of China and Russia is to diminish the dollar to its lowest, by doing so, the US will be forced "to pay" its national debt not with dollars but with goods.
European countries were supporters of the US dominancy by convenience, but today, these countries are also trying to be free of the US dollar dominancy, because the Federal Bank has been printing dollars without gold backing them up.
China and Russia have been buying gold in the last decade to make their currencies solid strong, and at the end, the balance between a dollar backed up "with confidence" against a ruble and yen backed up with gold, the later will enjoy more acceptance for trading purposes.
The last attempt made by the US to continue the "petro-dollar" in the world, was making Iraq its strong headquarter for this kind of trading, but times are changing, revolutionaries like ISIS are a thread to the point that the US might look for Iran and other former enemies as partners (like recently with Cuba), otherwise will end isolated.
A good way to contra-attack the Russia-Chinese attempts to destroy the dollar is to stop importing Chinese products and produce the same goods at competitive prices...or, "as usual"... create new wars... but where?