If they are involved in disputes or legal proceedings to do with investment or trade, their only recourse is to the mainland courts, where they have to proceed according to mainland law. One constantly hears reports of Taiwanese companies losing out on the mainland in such situations, and it would appear that in future they are likely to face the same problems in Hong Kong.
碰到投資貿易上的糾紛、訴訟，也只能向中共法庭投訴、依大陸的法規打官司，台商在大陸吃虧的事時有所聞，將來在香港恐怕也難避免。