Thank you for this question — many of us work with patients who have opposite Qi in the month and the year, not only in the stems but also in the branches.
To unpack this, we first need to understand what the stem of the year and the stem of the month represent: The stem of the year is more closely related to a person’s essential Qi and character. It reflects deeper, more constant tendencies in a person’s life and health and therefore shows up as long-standing patterns.
The energy of the month reflects the relationship of the Self to the outside world — how we make contact with our environment, with family and friends, with work, and with social structures. It is our response back to Heaven: how we deal with the world and how we digest what surrounds us.
For example, if someone is generally insecure and this has been a lifelong trait, this is more related to the stem and branch of the year. If, however, a person feels insecure only in a specific situation — for instance at work — this is more related to the stem and branch of the month.

When we see unlike Qi energies in the stems of the year and the month, it can seem as if they balance each other. In reality, this often becomes a trap. The person may try to compensate for an imbalance in the year stem (for example, He in Wood in your 1967 patient) through the stem of the month (Bl in Wood) which is the unlike Qi for He in Wood. This compensation usually happens through external activity — work, relationships, responsibilities — which can be very exhausting and may lead to further problems.
In general, people born with the Ding stem tend to be highly engaged in social relationships and experiences, often oriented toward the future and their goals rather than finding peace in the present moment. They frequently have difficulty slowing down and may turn to alcohol to quiet the mind. The active Metal here can bring rigidity, inflexibility, and dogmatism.
The Chinese character for the Ren stem depicts a person carrying a burden on their shoulders, symbolizing responsibility and effort. Ideally, this comes with acceptance, but it often manifests as struggle and frustration and is frequently associated with insufficiency of Heart Qi.
When we understand this dynamic, it becomes clear how the expression of Ren in the month — overworking, taking excessive responsibility for family or others — can further aggravate the challenges of a He in Wood person.