ēn zhòng qiū shān
恩:恩惠。恩情像高山一样厚重,形容恩义极为深重
宋 陈亮《谢曾察院启》:“上下交攻,命危丝发;是非随定,恩重丘山。”
恩重丘山作谓语、定语;用于感激词。
His great kindness is as weighty as a mountain.