从公众号后台注册的小程序和后来绑定的小程序有什么区别的呢？

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The small program registered from the official account is the relationship of automatic binding. This time, the qualification is public. And if the official account number is not yet expired, the small program can be used, right? Question 1. Does the applet have a certification expiration date? Official account 2 official account: if a public official account A is registered, it has bound the 1 small programs registered from the official account B and the 1 small programs registered from the public number C. Is there any difference between the 2 small programs and the direct registration from the public number A? Like a message alert? Question 3: if the public number A is bound with the 1 small programs registered by the official account B and the 1 small programs registered by C official account, can B and C untying the applet? Question 4: if the situation can be tied down, can the A public number be tied to the 2 small programs after the unbundled official account is reminded what? Question 5: a small program is bound to a number of official account. Is there any primary and secondary division?

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