Hello! I want to write temperature and humidity informations on 8x7 segment display.(with DHT11). Temperature should be on left 4 segments and humidity should be on last 4 segments. Can you help me please? I don't understand example codes of the display. I need help!
Getting started guide of the display:
Boy, are you ever in trouble!
That is one serious piece of junk!
I suggest you just cut your losses and get one of these properly designed modules that we can easily help you with:
Circuit of said module. 
Sensibly, not sold by Robotshop where "Getting started guide" is cited.
Still it can return, okay, i am going to give it back. Then? I am going to buy MAX7219 8X7 segment display.
What is the difference?
MAX7219 does all the display logic for you unlike that module which has the wrong driver chips, is missing the current-limiting resistors and will give uneven and limited intensity of the digits and requires your code to continuously and evenly (not so easy) perform the multiplexing of each of the digits.
With the MAX7219 you only send data to the chip when you want to display something different, the rest of the time you do whatever else your code needs to do, or just wait for instructions. And your display can be seriously bright or dimmed to one of 16 steps.
Same three control pins.