It seems Tao will begin his solo activities in China soon as he revealed to have set up his own workshop in his mainland.
According to various sources on June 11th, Tao has established his own workshop called 'Huang Z.TAO Studio'. Its official Weibo account confirmed the report by posting,"Hello everyone! This is Huang Z I Tao(Z.TAO)'s official studio. In the future, news and activities about Tao will be updated here. The account is being verified. We welcome everyone to follow us".
With the establishment of the studio, it's likely that Tao won't be rejoining EXO as he's expected to pursuing his career as an actor in China.