I canot find anything on takeing cuttings from chimonanthus, except that you treat them like forsythia, so hear we go'cuttings taken from green wood after flowering in spring or early summer, or' alternatively, place a weight over a branch to keep it on the ground' then after it has rooted'dig it up and cut from main plant then plant it, why not try both ,then you can tell us the best way

I haven't tried aerial layering yet, so I will give it a go. Thanks.