Find two idioms, the great god of Chinese studies.

The first one expresses the meaning of treating the symptoms rather than the root cause. You can use the eight-character idiom: treat the head with a headache and the foot with a pain.

The second expression is loyalty or even blind loyalty, which is usually seen in the dead in costume dramas. I haven't thought of a suitable idiom yet. sorry (Simple description of gratitude can use the idiom: knot grass rank ring)