All of Humanity is Secretly Watching Me Cultivate

Chen Chushi transmigrated to a parallel world and discovered that the sun was about to undergo a helium flash, destroying the world. All of humanity had already boarded spaceships and fled.As the last human on Earth, he wasn't worried at all.Because he obtained an achievement cultivation system, he wrote his own cultivation manuals and cultivated himself. He could freely use all the resources of the Earth, it was amazing...Unbeknownst to him, the humans on the solar system spaceships, through satellite surveillance, were eagerly waiting for him to write the next stage of the cultivation manual... That's right, they were secretly learning from him.