This move comes after Chinese President Xi Jinping met Nobel laureate Aung San Suu Kyi in Beijing earlier this week following China's Belt and Road Forum.
Last year in July, the 83-year-old emperor expressed his desire to retire due to his age and declining health that were making it hard for him to fulfill his official duties.
The exercises were reportedly a part of preparations ahead of a May 19 event during which a military parade will be conducted in front of President Joko "Jokowi" Widodo.