2 sentences

1. 这是一个单方面的决定。

   zhè shì yī gè dān​fāng​miàn de jué​dìng.

   This is a unilateral decision.

   Source: Dong Chinese Dictionary

2. 这是台方单方面做出的决定。

   zhè shì Tái​fāng dān​fāng​miàn zuò​chū de jué​dìng.

   This is a unilateral decision made by the Taiwan side.

   Source: Dong Chinese Dictionary