!! Warning: This hanjie is a linea, it is only logical with the constraint that the picture consists of a single curved line, thus each black cell has exactly two of its four nearby cell blacks (except the two ends) !!

This one puts its thinking cap on...

Difficulty : ***

Tested, logical (as a linea).
Edge-logic can be useful. You can use the fact that no segments can cross right through a line where there is no 1.
Good blackenage.