连宗法制都不存在，在封建社会又何来嫡长子继承制呢？

After all, this system did not exist, let alone the system of succession by the eldest son.

大少爷是陆府的嫡长子，长相俊朗，品性端正，未来自然不可限量。

The big young master is the Di eldest son of six mansions, the landscaping is handsome, conscientious role, the nature is limitless in the future.

周公构建的制度中影响重大的有宗法制、分封制、嫡长子继承制、法制等。

The most influential systems constructed by Duke Zhou include the patriarchal clan system, feudatory system, hereditary system and legal system.