[Lua] need help with religious_pressure

This is a request_for_favor from somewhere way behind the great world wonder---GFW.

My Confucianism(水 means water) big city,which had got 30 citizens,just got "eroded" by several small cities.WTF!!!
Then I learnd ,at standard game_speed, the religious pressure is always 6 per city.
I think the religious pressure should related to the number of citizens.
After all,men just like sheep are easy to follow the flock not the field.
So,please the most kind coder of all,tell me how to make "the_religious_pressure = city_number*2 + citizen_number*0.5"

ps.
I‘ve got CIV5 for just 6 days.it kills 8 hours each day.
It's should just like meth, easy to addict hard to withdraw.
If some one told me how to change the religion symbol 水 to 仁(sort of humanity),will make me higher.
Thank you.
the ancient font of "仁"

Thanks to anyone who read still----" tell Sid if you can,do more homework and decrease minimum requirement "

Time to high,OVER AND OUT.

 

please anyone relocated this to CIV5 forum