https://books.google.fr/books?id=X7SqV0wAYP0C&pg=PA50&lpg=PA50&dq=yam+cheu+empereur+tam&source=bl&ots=iWMa-l7hLj&sig=2Iej4ITXOArzyL8t2pdJ0BSm8Vo&hl=fr&sa=X&ved=0ahUKEwiCu87vv9jPAhVJ7hoKHQYBBIUQ6AEIHDAA#v=onepage&q=yam%20cheu%20empereur%20tam&f=false