I will fly from Zurich over Frankfurt, Peking to Auckland. I booked a Air China flight, but the first one, from Zurich to Frankfurt will be operated by Lufthansa. Every other flight is operated by Air China.
My question is: Which regulation regarding hand luggage are the ones I have to follow? The ones of the airline I will fly with first, or the one I with the most restrictions? Specifically Lufthansa's regulation says 8kg hand luggage, Air China says 5kg.
Also: Air China's website doesn't mention an additional "personal item" which most other airlines allow you to carry as hand luggage, e.g. a laptop bag or something alike. Doesn't Air China offer something like a "personal item"?