System: a Collective Time Travel, but No One Knows How to Become an Immortal

Lin Fei and his classmates were selected by a mysterious force during a party, and they all traveled to a universe where they could cultivate immortality. All around are strange flowers and exotic animals. Even if they can't use the abundant spiritual energy of heaven and earth, one breath will make their whole body feel transparent. Just when they were so excited that they thought they had opened the protagonist's copy, they were told that none of them could become immortals. … They cannot cultivate immortality and yet they are kidnapped here. What is the purpose of this thing? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.