The design is based on 3 important elements: "Macau", "Reunion" and "20 Years".
"Macau":
The pattern of the outer ring of the flywheel is lotus, which has become Macau's city flower after its reunion with China.
"Reunion":
The reunion happened on 20th December, 1999, 00:000 midnight. When the time is 00:00, the hour hand and the minute hand come together, the circles at the end of the hands combine and become the Chinese character "回", which means "reunion". The "回" is at exactly where the machine core is - the most valuable part of the watch.
"20 Years":
"1999" and "2019" are engraved on the watch to indicate the 20 years after reunion.