Lei Feng was originally named Lei Zhengxing, so what's his father's name, grandfather's name and brother's name?

Lei Feng (1940 ~ 1962) was born in a poor peasant family in Wangcheng District, Changsha City, Hunan Province. When Feng was only 3 years old, Lei Xinting, Lei Feng's grandfather, was forced to death by the landlord on the eve of the Spring Festival. When Lei Feng was five years old, another unfortunate thing happened: it was the heyday of the Japanese invaders, and Lei Feng's father Lei Mingliang was beaten by Kuomintang deserters on the way to deliver goods by the river. When Lei Feng's father was fighting against the Japanese invaders, he was beaten again because he had no money to treat the disease, and soon died. Because Lei Feng's family is poor, Lei Feng's brother 12 years old went to work as a child laborer. Because he was still young, he was so hungry that he eventually contracted tuberculosis and died soon. Most unfortunately, Lei Feng's only relative, his mother, hanged herself after being humiliated by the landlord on the Mid-Autumn Festival night of 1947. From that night on, Lei Feng, who was only seven years old, became an orphan, struggling to survive under the pull of his sixth uncle and his grandmother and his own wandering.