Someone planning a trip with a significant change in altitude needs to make sure their blood pressure is well controlled and their doctor feels their heart is strong enough to handle the added strain prior to making the trip.
Blood pressure should be monitored while traveling, since blood pressure medication may need to be increased during the trip. I do not know anything about Chinese medicine for blood pressure. There are doctors in China and in America that have practices combining the best of both eastern and western medicine. You might want to arrange a consultation.