What is An Shitong's real identity?

In the scarlet article TV779-783 (overseas version 832-836), it is revealed that it is a Japanese public security undercover.

In TV 683(File.808), An Shitou put a toothpick in front of the grave of the dead police officer Date Wataru, and there was a short message from Date Wataru in his mobile phone. They seem to be closely related. Anshi is probably the first in the police academy, as police officer Ida said, and the plot has not yet been announced.

When Bermodo called Bourbon, Antoine answered the phone with Okiya Subaru and Sera Masumi at the same time. TV 704(File.823) Finally, in front of Miyano Shiho (actually pretending to be Heiye Haidong), An Shi personally exposed his true identity as a bourbon.

In the document No.893, Conan's series of behaviors before he passed the security room pass, such as his keen insight, not killing Shirley, his special reaction to "zero" and the belief that the FBI casually said "leave my Japan", speculated that the security room actually had a common name of "zero" because it was called a "non-existent organization" responsible for Japan's national security and intelligence affairs. When Anshi continued to be at odds with the FBI, Conan boldly tested whether he was the "enemy of the bad guys" in order to ease the tension, but Anshi said that Conan misunderstood him, which made Conan wonder if he had misjudged. [22] [38] Later, Akai Shuuichi investigated his real name "Furuya Rei" according to the "zero" he revealed, and revealed his undercover identity as a Japanese public security policeman. Anshi sent police colleagues to ambush Judy and Kammeyer on Leye Mountain, with the purpose of forcing Chongya to admit that he was Akai, and then arrested Akai and handed it over to the organization, so that he could further organize the top management after his meritorious service, but this plan was stopped by Conan and Akai. Akai said that Jing made a mistake in pursuing his goal, and he didn't want to be an enemy of Jing. [1] It has been confirmed that the person suspected to be Akai on the mysterious train is Akai Shuuichi himself, and his face has been removed. This move is a bet made by Akai and others. The purpose is to deliberately let Anshi inquire about the inside story, so as to convey to Anshi his idea of "unwilling to be an enemy".