According to China's criminal law, the crime of robbery refers to the use of violence, threat of violence, or other methods to obtain public and private property for the purpose of illegal possession. According to the above definition, Which of the following acts do not constitute robbery:. ['Wang took away his backpack worth 10,000 yuan while Zhang was not ready.', 'Hong injected the sleeping pill into a beverage can on the train and let Zhang drink it. He stole 10,000 yuan in cash while he was lethargic.', "Li entered the house at night and stole 5,000 yuan in Zhang's clothes. Zhang was awakened, and Li fled with his belongings after threatening Zhang with a knife.", 'Zhang owed Liu a 5,000 yuan do n’t pay back, Liu lied to Zhang at home, intimidated Zhang to surrender his bank card and said the password. After Liu went to the bank to take away 10,000 yuan, Zhang was returned.']