[案例]退休工人老龙有一女一子两个孩子,儿子原与他一起生活。他原来想靠儿子养老,同居期间他留有自书遗嘱,死后把一套三居室的楼房留给儿子,并到公证处对自书遗嘱进行了公证。谁知,儿子婚后和儿媳妇远离家乡去外地打拼。退休后老伴去世,老龙孤身一人在老屋固守。随着年事日高,生活自理能力逐年减弱,心脏病频发。眼瞅靠儿养老有些靠不住,老 [Case] ​​The retired worker Old Dragon has a daughter and a son two children, the son originally lived with him. He originally wanted to rely on his son for an old-age pension. During his stay, he left a self-written testament, leaving a three-bedroom building to his son after his death and notarization of his will. Surprisingly, his son married and daughter-in-law away from home to work hard. His wife died after retirement, the old man alone in the old stick. With the increasing age, self-care ability weakened year by year, frequent heart attacks. Some rely on old-age pension, old