Wilderness Survival: From the Start in the Uninhabited Greater Khingan Range

Survival on the Ocean or Sky Islands, With System Critical Hits or Rewards

The protagonist can be male or female. I don't want stories with hints or prompts. I'd like something where the protagonist gets supplies through sign-ins or earns critical-hit rewards, and has to survive somewhere like an ocean or a sky island. (Please don't have them start from the start with just one island or a plot of land.) No harem, please! 🙏🏻