Wushu Tao
(https://www.wushu-tao.com)
Writing sheet of the characters : - láo gōng 劳宫 (Point d'acupuncture situé au centre de la paume)
   
For more informations about these characters and their pronunciations, consult this page :
https://www.wushu-tao.com/page_ac_liste_car.php