In the Three Kingdoms Chess Edition game, the quick guide on how to upgrade after level 20 is a collection element in the game. Players need to collect each to complete the collection. Players who want to collect them all can complete the collection task as soon as possible according to the guide on how to upgrade after level 20 of "Three Kingdoms War Chess Edition".
Smooth choice: Number of level 18 thieves killed: 26
Extreme choice: Number of level 20 thieves killed: 21
If there are not enough [Thieves] on the map, you can still gain experience by training the corresponding level of Thieves in the main city building [Martial Arts Field] to complete the upgrade.
Take the area near the state of birth [Hebei] as an example
Click [Map], select the resource points that need to be occupied, and increase the number of [Level 5 mines] in your own mines to 23, including 5 Level 5 iron mines, 8 Level 5 stone mines, and 5 Level 5 timber factories. 5 seats, 5 level five farms
Take the area near [Huangcaoguan] as an example
Smooth choice: Number of level 25 thieves killed: 36
Extreme choice: Number of level 30 thieves killed: 14
If there are not enough [Thieves] on the map, you can still gain experience by training the corresponding level of Thieves in the main city building [Martial Arts Field] to complete the upgrade.
You should have successfully reached level 30 at this point. Can easily defeat level 6 mine defenders and kill them