1935年12月3日，平津当局下令自即日起禁止《大公报》向天津华界（即天津租界外）发售、自4日起禁止向天津埠外邮递，1935年12月12日，平津当局解除禁令。《大公报》遭受停邮处分的直接原因是《勿自促国家之分裂》一文的发表，更深层次的原因则是，《大公报》近年与平津当局的积怨。舆论对宋哲元当局民族和国家立场的质疑，时局的机缘，共同促成了《大公报》停邮处分的解除。

On December 3, 1935, the Pingjin authorities forbid Ta Kung Pao to sell in Tianjin Chinese governed area, and forbid it to deliver in the outside area of Tianjin since December 4, 1935. Not until December 12, 1935, the authorities lifted the prohibition. The direct cause of the punishment was that an article named “Don't split the country” published on Ta Kung Pao on December 3, 1935. But the deep cause was accumulated rancor between Ta Kung Pao and the Pingjin authorities.