MIUI ROM is popular for it’s up to date and nice user interface. MIUI ROM provides lots of customization options. Daily lock screen settings are one of them. Daily lock screen settings you can choose photos which will appear on your lock screen in a certain time interval.
Here is the step by step guideline for lock screen settings. This hacks only works for MIUI Global ROM and MIUI China Developer ROM.
- Go to Settings-> Wallpaper:

- Select “Choose wallpaper”:

- Select ‘Daily lock screens’.

- You’ll see several options. Select “Enable Wallpaper Carousel’ to choose your favorite photos.

- Choose your favorite photos and click apply

- To set the time interval go to “Switch Interval” and select your preferable interval.

- You can also choose your camera photos as your daily lock screen. See the figure below:

Now you are successfully set to “Daily lock screen” features. Enjoy!
In MIUI Global 8.0.2.0 there aren’t such a functional.
http://en.miui.com/thread-263929-1-1.html
I have a redmi 3 S prime with global Miui 7 but there is no lock screen at all, I cannot set anything, the com.mfashiongallery file does not exist, and after choose walpaper there is no option to as in your pictures above. Is there no lockscreen int he global Miui 7 (I did not update or root or change the miui)