Air China baggage allowance varies by class and route. Typically, in Economy Class, passengers are allowed one or two checked bags with weight limits, commonly around 23 kg or 32 kg each. Business and First Class travelers often enjoy more generous allowances, including higher weight limits and possibly extra pieces. Carry-on baggage is generally restricted to one piece with specified dimensions. It's crucial to check the latest information on Air China's official website or contact their customer service, as policies may change. Be aware of excess baggage fees, which can apply based on weight and route.