Vanguards of the War of Resistance! Let's travel back in time together, classmates!

Fishing boats off Qinhuangdao have vanished into thin air! The protagonist and his classmates went out to sea to fish, only to find themselves all transported to another world! A system is a must! Cultivation is acceptable! Let's fight the war together! A group transmigration! This plot! It sounds terrifying! How will Director Rui write it!...