In 2007, China implemented RVSM between 8,900m (FL291)and 12,500m (FL411). Notice I wrote that in meters. I did that because of their unique implementation, known as China RVSM, which is expressed in meters instead of feet. To accomplish this, clearances are provided in metres, converted using a specific China RVSM table and flown in feet. For example, a westbound aircraft might be cleared by ATC to climb to and maintain (FL) 11600 metres. Referring to the table, 11600 metres converts to 38100 feet. The pilot would set FL381 in the NAV and climb as cleared.
On November 21, 2007 the The People’s Republic of China implemented metric RVSM. This is how it was implemented on that day, according to the FAA:
ATC will broadcast: “Attention all aircraft, RVSM operations will begin in 30 minutes.”
15:30 – 15:45 UTC
ATC will accommodate RVSM noncompliant aircraft at and below FL 8400m
ATC will broadcast: “Attention all aircraft, RVSM operations will begin at 16:00 UTC.”
16:00 – 16:30 UTC and onward
ATC will clear RVSM compliant aircraft to climb or descend to the nearest appropriate RVSM FL in accordance with the China RVSM FLAS.
All aircraft operating in RVSM airspace will be cleared in accordance with the China RVSM FLAS.