What does it mean = Your Research-Network 5 clients, lvl50, max 150 days..
I red it but am still confused.
for example, my espionage lvl 12 takes 6 days. after i built 5 lvl 10 research there is no change
There is a maximum time which a research can "costs" ... so the maximum you can achieve from this feature is a time reduction to a minimum of 30days.
So long as you research things faster than these 30days you didn't will see results at all.
If a research takes 500days and you have a research network on 150 days, the research will take only these 150days from your network.