Since the PCA published its 6th Press Release after 2 rounds of hearing on the admissibility issue of the Philippines vs. China arbitration case over the South China Sea, there has been no reported formal response from the Chinese side. The mandate reply date in Auguest set by PCA has passed. 

More likely the case is going in the direction of an unilateral argument by the Philippines just as it was an unilateral initiation without the consent of the Chinese side. The possibility of any enforceable result is merely foreseeable.