C909 body refinement continued

Body refining secret technique!

Yang Junshan had an idea and quickly said, "Please advise me, senior!"

Daoist Dongliu pondered for a moment, then said with a serious expression, "One skin two meat, three veins and four bones, five internal organs, seven marrow and eight blood, nine indestructible. Do you know the principle of body refining?"

Yang Junshan was slightly stunned