This is the 2058th most frequent Japanese word.
優良
"優良" means "excellent" or "superior" in quality.
In this sentence, '優良' is used as an adjective meaning 'excellent' or 'superior,' describing the performance or results achieved.
彼は優良な成績を収めました。
He achieved excellent grades.
Here, '優良' is an adjective used to qualify the company as being of superior or high quality in its category.
この会社は優良企業と認められています。
This company is recognized as a superior enterprise.
In this usage, '優良' modifies '品' meaning 'goods,' indicating that the products are of superior quality.