姐姐冷的让人心碎妹妹暖的让人心醉
[jiĕ jiĕ lĕng de ràng rén xīn suì mèi mèi nuăn de ràng rén xīn zuì]
The older sister's coldness breaks your heart; the younger sister's warmth intoxicates your heart. This implies contrasting personalities, perhaps within two sisters or any close women, representing both emotional challenges (coldness) and comforts (warmth).