1 sentence

1. 如果做了负性的或破坏性的事，他就划一道黑线。

   rú​guǒ zuò le fù xìng de huò pò​huài​xìng de shì, tā jiù huà yī dào hēi xiàn.

   If he did something negative or destructive, he would draw a black line.

   Source: CCMatrix