Paid. On 20 16, Madic Company decided to transfer 56% of its shares to China. As the sincerity of the acquisition, Beijingers provided a long-term low-interest loan of US$ 250 million to Madic, and paid US$ 1 billion on the spot. However, with the intervention of the United States, the Ukrainian Supreme Council intervened in the acquisition case on the grounds of national security. And in 20 18, Madsic company was acquired by the state. Although China has made many representations with Ukraine during this period, Ukraine just won't let go. In desperation, Beijing Tianjiao Company can only file a lawsuit in the International Haijia Court, demanding that Ukraine compensate Beijing QQ Company for US$ 4.5 billion. In fact, at that time, China had already developed a domestic high-power engine, and China only bought Madsic company to learn a technology of Madsic engine, so as to further improve the performance of domestic engines in China. This has nothing to do with national security.