编辑同志:张某与郑某是老乡关系。去年年初,张某将自己的住房租给郑某,郑某希望张某在租金上予以照顾,张某同意了郑某的要求,免除了郑某半年的租金。租用一年后,两个人因琐事发生矛盾,关系恶化。郑某提出解除租赁关系,张某同意,并要求郑某补交原先表示免除的半年租金,郑某拒绝支付,双方因而产生纠纷。请问,这半年的租金能免除吗? Editor's Comrade: Zhang and Zheng are fellow relations. Early last year, Zhang rented his own housing to Jeong, Jeong hopes Zhang to take care of the rent, Zhang agreed Jeong's request, eliminating the rent Zheng half a year. After one year of renting, the two people contradict each other because of their trivial matters and their relationship is deteriorating. Jeong announced the lifting of the lease relationship, Zhang agreed, and asked Jeong to make up for the original half-year rent exemption, Jeong refused to pay, the two sides and thus disputes. Excuse me, can this six months rent be exempted?