Ask for a mobile phone with a lock screen pattern of nine squares.

I suggest you don't use the Jiugong sliding lock, because it is not safe. People just need to pay attention to how many times you open it. It is best to use a password or a digital PIN. If you like, provide the following scheme: (Because there is no data cable, the pictures are all taken with a camera)

Scheme 1, this. . I don't know what shape it is. . Everyone is free YY.

Difficulty: ★★☆☆☆☆

Option 2&; #9829; shape

Difficulty: ★★★★☆☆

I think you can see the relationship between figure 1 and figure 2 by looking at it a few more times.

Scheme 3&; #9824; shape

Difficulty: ★★★★☆☆

Is it very similar to the above two pictures? The difference is that people who look closely will find that.

Finally, I'll give you one, hmm. . Facing the sky. . The arrow can't describe its direction. .

Difficulty: ★★★★★★★★★★★★★★

Finally, please adopt, thank you!