What is carry-on baggage allowance for Vietnam Airlines?

According to Vietnam Airlines’ policy, each Economy Class passenger can carry 1 piece of baggage on board, meanwhile, each Business Class passenger can carry two. Each piece has a maximum weight of 7kg and the sum of three dimensions is required to not exceed 115cm (56 cm x 36 cm x 23 cm) or 45 inches (22 x 14 x 9 inches).
In case your hand baggage exceeds the required weights and dimensions, Vietnam Airlines reserves the right to refuse to load your baggage as a carry-on and request the baggage to be sent as checked baggage.