Simplify the following text for a Grade 10 native English-speaking person.
Original: This notation form was called jianzi pu ( æ å -- è ) ( literally `` reduced notation '' ) and it was a great leap forward for recording qin pieces .
Simplified: This notation form was called jianzi pu ã '' æ å -- è ã ( literally `` reduced notation '' ) and it was a great step forward for recording qin scores .