|Master of Stools|
Note that the Hao Jin Demiplane by definition is an extradimensional space. Items and spells that use extradimensional spaces do not work inside other extradimensional spaces. Therefore things like Create Pit, Handy Haversack, Bag of Holding should not function in the demiplane. Probably not intended but appears to be RAW.
PRD: "Demiplanes: This catchall category covers all extradimensional spaces that function like planes but have measurable size and limited access."
PRD: "A number of spells and magic items utilize extradimensional spaces, such as rope trick, a bag of holding, a handy haversack, and a portable hole. These spells and magic items create a tiny pocket space that does not exist in any dimension. Such items do not function, however, inside another extradimensional space."