In the game CSGO, the function of replacing contracts is called alchemy. There are five different levels of gun accessories in the game, which are consumer, industrial, military, restricted, confidential and secret. Players can use the replacement contract to synthesize the low-level gun ornaments of 10 into the high-level gun ornaments of 1. The replacement contract rules are as follows:

The item with the highest level in the 1. set cannot be used in the replacement contract.

2. Souvenirs cannot be used in the replacement contract.

3. Only articles of the same type and grade can be applied to the same replacement contract.

4. Legendary items cannot be used to replace contracts.

5. The replacement contract will only produce higher-level items in the collection to which the replacement item belongs.

Basic principles of substitute contract

Only 10 pieces of skin with the same quality, the same kind (except souvenirs) and not the highest collection level can be replaced, and the synthetic result depends on the collection of this 10 piece of raw materials.

Homogeneity: refers to the skin with the same skin grade, such as 10 catch, 10 restriction grade.

Similar: Except souvenirs, ordinary and dark gold can be used for synthesis.

Synthetic result: If 10 raw materials come from 10 set, the skin will randomly become one of these 10 sets. If more than 10 of raw materials come from the same collection, the result is that the collection is more likely.