C70 What Level Are You at

Tang Jiutian had learned about the rating system of the Dark Night Network from Guo Rui before he boarded the ship.

He also understood what grade S meant.

Grade D, C, B, A and S were set by the Dark Night Network decades ago. Now, it had become the default rating system of the world.

No one doubted the fairness of the Dark Night Network, and no one dared to do so