China Doll Leaf Scorch: Light, Water, Drafts, or Smoke?

Your young China Doll (Radermachera sinica) has leaves curling black/charred from the tip, stem stays green. Extremely sensitive plant—four suspects:

1. Too much direct sun. Needs curtain-filtered east window.
2. Tap water chemicals. Use distilled water (fluoride/chlorine/salts burn tips).
3. Cold/hot drafts. Check AC vents, ceiling fans, doors.
4. Cigarette smoke. Can kill China Dolls in days.

Fix

Move to filtered east light, water with distilled, eliminate drafts/smoke. New growth will be clean.