Officials of South Korea's Northeast Asian History Foundation have met with U.S. officials at the Congressional Research Service who wrote a controversial report containing a distorted historical claim made by China.

A senior South Korean embassy official in Washington has also met with an official of the U.S. Senate Committee on Foreign Relations related to the drafting of the report and conveyed Seoul's concerns.

The Senate committee says the report will come out next month, but it promised to indicate in the report that China's claim is simply being introduced and has no relevance with the stance of U.S. Congress.

It said it will sincerely reflect South Korea's opposing argument against China's distorted historical view in the report's appendix.

South Korean embassy officials in Washington will keep close tabs on developments along the way as Congress has explained that the report was written based on the projection that China can be an obstacle to the unification of the two Koreas.

The report is known to carry China's one-sided claim that the ancient Korean kingdom of Goguryeo was subordinate to a Chinese dynasty.