三部计算法简介：After the assault system is upgraded, firearms can only be upgraded by strengthening them, and various top-grade ores are the best materials for strengthening firearms. Now that he has encountered it, Qin Fen cannot let it go.
After the assault system is upgraded, firearms can only be upgraded by strengthening them, and various top-grade ores are the best materials for strengthening firearms. Now that he has encountered it, Qin Fen cannot let it go.
