The Four Dharmadhatu (Chinese: 四法界), is a philosophical concept propagated by Master Tu-shun (Chinese: 杜順; 557-640 CE), the founder of Hua-yan (Chinese: 華嚴) school. It builds upon and is a variant of the Dharmadhatu doctrine.
The Four Dharmadhatu
The Four Dharmadhatu were outlined in Tu-shun's treatise which has been rendered into English as 'On the Meditation of Dharmadhātu'. The Four Dharmadhatu are:
References
Four Dharmadhātu Wikipedia(Text) CC BY-SA