Shandong Airlines typically offers Business and Economy cabins (with First or Premium Economy on some widebody/long-haul routes). Cabins differ notably in seating, catering, baggage allowance and mileage accrual.
For short routes economy is usually the best value; on overnight or long-haul flights Business meaningfully improves rest. Watch for upgrade offers with miles or cash around check-in time.
Product-wise: Shandong Airlines runs a dense 737 network from Jinan and Qingdao with strong business schedules, codesharing widely with parent Air China; PhoenixMiles members earn on SC flights.