Landing of aircraft at night and in bad weather, for instance - crucial to regular offshore carrier operations - remain far from routine, several of the attaches and analysts said.
"Carrier operations are a very complicated game, and China's got to figure this out all by itself.
A new plane, the KJ-600, designed to perform a similar role to the E-2C/D Hawkeye launched from U.S. carriers, is still in testing, according to the Pentagon's latest annual report on China's military.
Several countries operate aircraft carriers but the U.S. remains the most dominant, running 11 carrier battlegroups with global reach.
A September editorial published in a magazine run by a PLA weapons manufacturer, titled "Four great advantages the PLA has in attacking Taiwan", did not mention the role of Chinese carriers.