Start with what the Buick Park Avenue (China) is: a car with gasoline engine, from Buick. What it meant takes a little longer.
The hardware
The engine is gasoline engine. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Family and rivals
Its Buick stablemates include the Buick First Call and the Buick Funeral Car.
The record
The open record for the Buick Park Avenue (China) carries no verified engine, output, weight or price yet. MotorJury does not fill gaps with guesses; this entry gives the model a home in the catalogue and grows as sourced specifications and photographs arrive. Corrections: corrections@motorjury.com.
Buick1899
Buick Park Avenue