Portable weapons arsenal system (funny version): The protagonist is bound to an unreliable "super arms supplier system" when traveling through time.
Function: Provides modern weapons, basic ammunition production line drawings (you need to find materials yourself), basic military training manuals (with pictures and texts but full of translation), and a small amount of black technology materials (such as high-strength light alloys).
Features:
Supply of drafts: Sometimes there will be drafts. For example, if you ask for an AK47, you will be given a water gun (looks like), and if you ask for grenades, you will be given a box of cannons. It requires the protagonist to complain in order to be "calibrated".
Cheating tasks: The tasks posted are often nonsensical (such as: shooting down a sparrow with a mortar to prove accuracy; performing a square dance in front of the county government office to improve public sentiment).
Vicious tongue AI: The system AI is a venomous tongue who loves to complain and watch dramas. He often bickers with the protagonist.
Energy limitations: Large weapons (such as early artillery, late-stage tank prototypes) need to consume the protagonist's "energy" (shown as making him particularly hungry or sleepy) or collect specific "energy" (such as high-quality iron ore, some kind of jade).