Full coverage: The South China Sea Issue

The Xinhua news agency has accused the US government, the Philippines, the arbitration panel and Japan's prime minister Shinzo Abe of collusion in the recently concluded South China Sea arbitration case.

Four of the five arbitrators of the temporary tribunal were appointed by Shunji Yanai, the former president of the International Tribunal for the Law of the Sea. The former Japanese diplomat's political stance and speeches went against the principles of the independence of the international judiciary. Shunji Yanai served the Japanese Foreign Ministry for 40 years from 1961. He has been involved in controversial issues, including Japan's 2015 security bill, and the Diaoyu Islands dispute with China. He has a close relationship with Japanese prime minister, Shinzo Abe.

The fairness of the tribunal's operations was called into question by the personal wishes of Shunji Yanai. The Xinhua news agency commented that it was not surprising that Yanai generally chose arbitrators who were biased against China.

In addition, an American legal team provided help in drafting thousands of pages of legal documents, representing the Philippines presenting arguments to the tribunal. American lawyer Bernard Oxman, who represented the Philippines, had worked with most of the arbitrators and Yanai. He attended the third United Nations Conference on the Law of the Sea as a representative for United States government. Based on the principles of independence of the international judiciary, the impartiality of a judge can be questioned if there are any links to a party involved in a case. Despite that, Oxman was still involved.

There is no doubt the close relationship between Oxman and US government, the Philippines government, arbitrators, Yanai and Abe. These links form a complex network of special political interests. The Xinhua news agency says they took advantage of legal platform and after three years they issued their pre-arranged ruling and finished their political farce.