War of Resistance: Rebirth of the Battlefield, My System Can Be Updated

[Micro system + portable space + independent development + underground transportation station and immortal number interconnection] Zhang Zilong was accidentally reborn during the Anti-Japanese War. He rescued a beautiful female bandit, built a mountain stronghold, recruited troops and horses, and raised the banner of the "Qingshui Village" Anti-Japanese Volunteer Army. Beat up the little devil.