How can I avoid getting high altitude sickness?
First, listen to your body. A gradual ascent will allow your body to acclimatize to higher altitudes and the decreased oxygen supply. Do not take too much exercise per day and have more rest.
Medication can also help to prevent high altitude sickness. Mild symptoms can be treated with proper medication, including Diamox (Acetazolamide) and Honjingtian (Rhodiola Eoccinea).