The crime of mediation and bribery, also known as the occasional acceptance of bribes, refers to the convenience of the state staff by using their power to form a position, and through the behavior of staff of other countries, to obtain unfair benefits for the trustee, solicit the trustee's property or accept the trust People and property. According to the above definitions, which of the following is crimes of mediation and bribery? ["The principal of a private school, Zhang, received a red envelope from a student's parents, and entrusted his teacher to falsify the student's transcript.", 'Chairman Li gave his wife, the chief of the audit department, a car, which successfully made his company escape the audit review.', 'Xiao Zhao, who is responsible for customs clearance of overseas goods, often receives gifts from overseas buyers and helps them evade taxes.', 'Police Sun asked an old colleague from the traffic management bureau to help Xiao Li delete the illegal records and asked Xiao Li for a benefit.']