The Caspian Sea can be connected with the Baltic Sea and the Black Sea through the Volga Canal. Iran can buy several small tankers to transport oil to the north shore of the Caspian Sea, and then transport it out through the oil pipeline from Kazakhstan to Alashankou, Xinjiang, China. This line has been built, and several more can be expanded in the future. The United States cannot calculate whether Central Asian oil, Russian oil or Iranian oil is transported through this pipeline. In this way, it is impossible to sanction China, even if the sanctions are not aimed at China alone.

If we build a pipeline from Gwadar, Pakistan, and cross the tall Karakorum Mountains and disputed Kashmir into China, the construction cost will be very high and unsafe. Not to mention the possibility of local wars between China and India, India and Pakistan, and India, the Taliban, Al Qaeda and separatist Baluchistan tribes cannot afford the terrorist attacks on the pipeline. Under the framework of the SCO, Central Asia cannot follow the West. This line is the safest.

Although the oil supply in China is not a problem now, the oil price is greatly affected by the fluctuation of international oil price. If China and Iran form a quasi-strategic alliance, Iranian oil can guarantee the sustainable development of China. Kazakhstan can get transit fees. Their oil will not decrease, but will only increase. Because compared with sea transportation, pipeline transportation costs are lower. China can even collect transit fees and resell Iranian oil to South Korea and Japan.