What is the perfect truth in Tientai Buddhism?

It it well known that Tientai teaches the identity of the mundane and real truths. - In its complete teaching, what is being equated? Is it equating the **real truth** of the *separate teaching* with the complete teaching's **mundane truth**? The so called "separate teaching" is what Yogacara and Hua-yen Buddhists claim, and Zhiyi says (translated by Swanson) says that therein: