The thief stepped on the mark. O+ and O 1 O2 were both pumped up and down?

1, "+-":there are people at home during the day and no one at night; The symbol is reversed, that is, there are people at night and no one during the day;

2. "⊙": single or tenant;

3. "...": three family members;

4. "√": entered;

5.“☆”； : goal;

6. "X" is not a target

In particular, nine kinds of strange symbols are drawn in red ink, with "standard answer" beside them: a fork symbol means "planned action", five small oval combinations mean "this family has money", while the M-shaped wavy line means "there are evil dogs at home", and there are other explanations such as "police", "easy to be caught", "beware of neighbors" and "alarm", which are different.