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On May 20, the A-share aerospace and military sector changed in the afternoon. The share price of Xinyan (Rights Protection) rose again, rising more than 19%, and Xinyu Guoke rose 14cryptoslots.80%, and Refining Stone Aviation, Triangle Defense, Dawn Aviation, Zongheng Shares, Tianhe Defense, and Aerospace Nanhu rose one after another.

Central Control Technology (688777) flashed in the afternoon, falling more than 15%. As of the close of May 20, Zhongcontrol Technology closed at 42cryptoslots.35 yuan/share, down 8.57%.

Regarding the sharp fluctuations in stock prices, the head of the Securities Department of Zhongkong Technology responded in an exchange with securities companies that everything is operating normally. "At present, our Middle East business accounts for a very small proportion, with a volume of one to two hundred million yuan. And the company has no business in Iran and has no impact on the company." The above-mentioned person said.

The share price of Sinosteel International (000928), which had previously won the bid for multiple Iranian projects, also fluctuated significantly on May 20, closing at 6.80 yuan/share, down 0.87%.

Sinosteel International's 2023 annual report shows that the company's overseas business revenue and newly signed contracts have reached new highs, with some projects focusing on the Middle East. It is reported that Sinosteel International has previously won the bid for several projects in Iran.

Northern International (000065) closed down 1.13%. It is reported that North International has occupied a large market share in the field of rail transit in Iran, with its business covering electrified railways, general contracting of subway projects, and export of complete sets of equipment.