Traveling Between Two Worlds: From Bread for Maids to Fantasy Overlord

The [Interdimensional Communication System] will automatically bind you after the college entrance examination. Initially, it unlocks two-way travel between the modern city and the Qingming fantasy world. There is no cooldown, fixed coordinates that can be upgraded, and it comes with storage space (expanding with level), cross-world language proficiency, quest rewards, spiritual root activation, realm assistance, and other functions. The time flow rate between the two worlds is 1:1 (can be fine-tuned later).
Modern City: Starting as an ordinary third-tier city in the Blue Star Kingdom, it later expands globally, overwhelming the fantasy world with its modern technology, firearms, resources, and commercial system.
• Qingming Mystic Realm: Low-level mortal realm (mortal strongholds, bandits, refugees) + mid-level immortal cultivation realm (sects, families, demon race, spirit race) + high-level realm. Cultivation levels: mortal → Qi Refining → Foundation Establishment → Golden Core → Nascent Soul → Deity Transformation → ... Resources are scarce, and the strong prey on the weak. Refined salt, medicine, and daily necessities are comparable to treasures. The Qingming Mystic Realm is full of gold nuggets, ginseng, and jade, which are brought back to modern times and are snapped up by big shots.