There also has been speculation over whether recent seismic events, particularly a powerful 2015 earthquake in Nepal, had affected the mountain’s height.
State-run Xinhua news agency have touted the expedition as a chance to achieve a highly accurate measurement, saying survey equipment will ping signals off a Chinese satellite and that other “advanced domestic surveying and mapping instruments” will be employed.
It was not clear when the survey results would be released, but China and Nepal agreed last year to reveal the findings in a joint announcement.
The expedition set out on April 30, but was delayed twice due to bad weather.
Climbers only have a short window of opportunity to make the risky ascent during the main spring climbing season before the approaching summer monsoon brings dangerous climatic conditions.
The 2019 climbing season saw record overcrowding on Mount Everest, which led to 11 deaths as climbers waited hours in lines to reach the summit with dwindling oxygen supplies.