There is no universal standard to measure the degree of "harmony" between husband and wife. But it is generally believed that the most harmonious relationship between husband and wife needs to have the following characteristics:

Mutual respect: Husband and wife need to respect each other's feelings and ideas.

Loyalty: Husband and wife should be loyal to each other and have a sense of responsibility for each other.

Communication: Husband and wife need to establish good communication channels and be able to listen carefully to each other's ideas.

Mutual assistance: Husband and wife should help each other and cope with the challenges in life.

Mutual understanding: Husband and wife should be able to understand each other, tolerate each other's shortcomings and try to resolve conflicts.

Generally speaking, a healthy relationship between husband and wife needs to be based on mutual respect, loyalty, communication and mutual assistance, and can accommodate each other's shortcomings.