The firewire crossing package is a "system vulnerability", which can be used without spending money, but it can only be used in bounty mode because of the firewire crossing system version 2.8 and 2.9. Its only tools are WPE's "E2" and Ccp. Use WPE to read the package first, then the target program, select Ccp, enter the game, click the black triangle above, wait for a while to cache, press the red square, select the first code, right-click to send, copy the port, and close. Switch to the personal warehouse in the game, then click the triangle below, paste the port you just copied, and click the triangle in the window to send, OK!