What do "double flight" and "double regulations" mean respectively?

Slang: It means to have sex with two women or two men at the same time. Crossing the line of fire means that two people press squats face to face rhythmically (preferably overlapping their bodies), and there is no terrain BUG in the air. This bug has been closed.

Double regulations:

The term "double regulations" comes from the third paragraph of Article 28 of the Regulations on Case Inspection of the Party's Discipline Inspection Organs in China, which requires the relevant personnel to explain the problems involved in the case at the specified time and place. It turns out that our country can detain and examine criminal suspects for a long time. However, it was humanized later, and the detention could not exceed 24 hours. But for some government officials, if they release people as soon as 24 hours arrive, they can destroy evidence and collude in series. This loophole is made up by double regulations. For party officials, it is necessary to clearly explain the location and time of the problem.