Invincible Super System Modifier

When Lin Fei woke up, he discovered that he had been transported to the zombie infested apocalypse. In this life or death situation, he had obtained the strongest Modifier system.
"Function 1: Invincible. "Status: Not started."
"Function 2: Infinite Life. "Status: Not started."
"Function 3: Infinite Stamina. "Status: Not started."
"Function 4: Infinite Load. "Status: Not started."
"Function 5: Tools are limitless, items are limitless. "Status: Not started."
"Function 6: Super Speed. "Status: Not started."
Piercing through walls, peeking through windows, aiming at himself, locking heads … All functions.
Activate! Activate! Activate!
In that case, who can kill me?
In this apocalyptic world where everyone was in danger, Lin Fei was unscrupulous as he wandered around in the city with the most zombies. It was as if he was at home.
The food that was as precious as life could be taken out of Lin Fei's bag in a steady stream. Even the water used for bathing was made from mineral water!
To others, this was the apocalypse. To Lin Fei, this was a vacation.
"Here?" "One of the strongest zombies in the entire universe that can block one of my attacks."