A bi-polar axis of trade can tend to be one-side, with goods flowing only in one direction, such as the United States experienced with China since 2002. The net result is like an ocean tide, while payment for goods flows into [[China]] like a high tide, the United States is drained. | A bi-polar axis of trade can tend to be one-side, with goods flowing only in one direction, such as the United States experienced with China since 2002. The net result is like an ocean tide, while payment for goods flows into [[China]] like a high tide, the United States is drained. |