Desert Survival, when I entered a month in advance

A strong woman with no CP, upgrade flow, and daily life. Due to a system bug, Feng Chan was teleported into a game called "Everyone's Survival" in advance. At the beginning, she had to open three or five boxes every day to survive. There were many dangers under the quiet surface, and she would die if she was not careful. It was not until a month later, when the game officially started and the first batch of 30 billion people entered, that she suddenly realized that she was actually in the game. Fortunately, the game was kind enough to compensate her with a chance to draw a lottery. Just after the lottery, a magical system was bound, adding a little uncertainty to her future. Entering a month of accumulation in advance, let's see how she survives with a little advantage! ... Maps are released one after another...