Are all BMW 4S stores in Suzhou owned by the same company?

No. Suzhou BMW 4S stores are not owned by the same company. 4S stores are sales stores that integrate car sales, maintenance, accessories and information services. 5S includes: vehicle sales, spare parts sales and promotion, system information feedback (maintenance service) , used car trading, because the English letters of these five words all start with S, so they are called 5S stores.