Star Project: Why Are They All Time Travellers?

Chen Mo traveled through time, joined the Fanxing Project for who knows what, established a system, and became a prince, and he became prosperous today! It's just that this world seems a little strange... What should you do if you are haunted by a strange ghost? What should I do if my girlfriend says she is a spiritual being and turns into a glowing ball? What should you do if you are being chased by strange people all the time? Also, why does the system keep telling me to kill people?