You can hear a click turning the weels every half of number. And I can't see what is up or down the weels. I even can't feel it using piece of metal from drink can. The "pull shakle" method doesn't work too.
Here are some photo.
Here the lock is locked. It's small - 2 cm width and 5.5 cm height.

Here the lock's opened with a code.

I just can't open this cheap chinese lock without a code!
