The essentials of this action are unclear. I don't know how to complete the action without practicing it. It should be like this:

1. Lift the left upper arm, with elbows flat on your chest, palms outward and thumbs down;

2. Lift the elbow horizontally on the chest of the right upper arm, with the palm inward and the thumb of the right hand upward; Put your arms together,

3, two forearms close together, at the same time, both hands clenched forearms.

4, keep the action essentials of 3, raise the forearm, the height is just not in front of your line of sight.