Aloha Gordon,
IF chunyi's sounds are longer than your breath, give yourself permission to tkae two breathes in one location.
You are breathing and bringing energy into an area, not a point, so there isn't a need to get it perfect. Remember: Good, Better, & Best.
Some people may feel the sound in that area, others' visualization will be their dominant feedback, while others will find it easier to feel the breath going into each area. Be patient and gentle with yourself.
Much Love,
Shawn