Supersonic drones, do you think they will be used to deliver express delivery?

Lin Yu, the second generation of rich people: "I want to participate in the technology venture capital meeting in six months, so I want to ask you to help me design a large drone!"
Chen Mo: "Do you have any requirements?"
Lin Yu thought for a while: "The first one needs to be big, and the second one needs to be fast. I plan to use it to deliver express delivery in the future, so it will carry much more weight."
Chen Mo nodded: "Okay, it needs to be bigger, it needs to be faster, and it carries a lot more weight."
Half a year later, Z Technology Venture Capital held its meeting.
When a large drone with a total length of 20 meters, a height of 6 meters and a wingspan of 30 meters breaks through Mach 1.5 at an altitude of [-] meters.
Everyone looked up at the white track in the sky, dumbfounded.
At the venture capital meeting, an international friend from Camel Country came to our door curiously, wearing a white headscarf.
Lin Yu: "No, no, no, you can't mount anything on the wings. Didn't you buy it back and deliver it by express delivery?"
Chen Mo: "It can mount 20 LJ-7s."
Lin Yu: "You can't put a guy who can grow mushrooms in the cabin. What are you going to do if you buy them back?"
Chen Mo: "It's actually not impossible to let go."
Lin Yu: "Chen Mo, are you sure this is for express delivery?"
Chen Mo said seriously: "Yes, it's a courier. If someone says otherwise, you can sue him for defamation."
An international friend said: "Can we buy a few planes? We have a group of robbers coming here to steal our oil."
Chen Mo smiled and said: "One machine has two million green coins and supports scan-code payment."

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