data downloaded from links shared by app Statistics
demand:
A user can share his Url link followed by his user ID, such as www.aa.com/share?user_id=123
, and then other users click on this link to download APP, and then the user registers to get the parameter user_id=123 automatically

the scheme is as follows:

1:IP  user_id 2
2: IP 123 

but IP may repeat, or in the beginning, users use Wifi to open the sharing link and sign up using a 4G network

designed a unique representation that both H5 and App are available?

Plan 2:

I saw a company doing this on the Internet, but I didn"t understand his principle. His h5 collected information and passed it to the server, and then APP got it from the server. The question is, how did he get it? According to a key? So how is this key generated?