Example: how to implement group buying and seckilling? Have the heroes who have done this kind of mall give snacks?

Q: How do I implement group buying and seckilling ??? Some heroes who have done this kind of mall give snacks ??? Q: How do I implement group buying and seckilling ??? Some heroes who have done this kind of mall give snacks ???, Q: Which of the following is my explanation? I have done flash sales. If you are worried about inventory, write a virtual inventory. The UNIX timestamp is required. How to implement the time countdown using JS ??? Some heroes who have done this kind of mall give snacks ???
Q: How do I implement group buying and seckilling ???
Some heroes who have done this kind of mall give snacks ???

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Q: Which of the following prawns can I explain?
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Second-kill. If you are worried about inventory, write a virtual inventory. The UNIX timestamp is required. Time countdown using JS