Filial piety does not lie in how much money you give your parents, nor in how much you wronged yourself. The key is whether you have the filial piety.
Give an inappropriate example. I love someone, and I want to give her roses and a house. The essence is the same, right? If the other person loves me instead of my money, then she will not only be satisfied with the house I gave her, but also feel that roses are too shabby to express my love for her.
For parents, paying half the salary is very stressful. In fact, it is far better to care about your parents everywhere, take some home after eating delicious food and buy a new dress that your mother likes (it will be more perfect if the model fits you). These concerns are all in the details. It is more important to always care about parents' wishes than how much money you give them.
You are very filial, but you always set a standard for yourself. This standard may be achieved by someone around you, appreciated by your parents, or praised by the surrounding environment as a benchmark. In short, I give you an established impression: only in this way can you be filial. But is this necessarily right?
Every family has a difficult experience, and parents and children have different personalities and ways of getting along. True filial piety also varies from person to person. I don't think you need to care too much about outsiders' opinions or external standards. You know in your heart that you are filial to your parents, and you should try your best to understand your parents' hopes for you and see how they think you are more comfortable to be filial to them. For example, maybe your parents don't care how much money you give them, but they want you to go home often. Even if you only carry two Jin of apples, their children will be very happy to go home and chat with them-then why do you force yourself to do those so-called high-standard filial behaviors that make you stressed and can't make your parents happy?
The original intention of filial piety is to make parents feel happy. How to do it depends on the actual situation of you and your parents.