These are the chances of drawing prizes from Large Boxes. According to wotclue, the data is official.
In the summer of 2020, a new version of WoT was released in China and in accordance with the legislation of this country, the chances of winning individual awards must be open and publicly available.
The awards are divided into four groups:
100% chance:
-250 gold
-Tier V decoration from a specific collection
-Decoration of a random level from a specific collection;
- something from the list below:
85.94% chance: premium account, gold or credits;
11.66% chance: tier 3-6 premium tanks;
8.4% chance: tier 8 premium tanks and 3D styles.
You can only receive 3D styles that you do not already own (only one 3D style of each type per account).
Link to source image (russian text)