There are four people in his family

家里───of one's own unit;四人───Four

Actually, according to the principle of bearing responsibility solely for one's own crime, substitute punishment should not adopt to the crimes committed by unit but those committed by natural man.───由果溯因，根据罪责自负的原则，采用代罚制的犯罪其实是自然人犯罪，而不是单位犯罪。