Not a heat suppressant.

" Young master Mu Yan?" While Situ Mu Yan was lying on the floor of his room, he heard the voice of a maid which was followed by two repeated knocking. 

" What?" He asked with his arm pressed over his eyes, his voice echoed in the room causing the knocking on the door to pause before the maid who was standing outside replied, " The old master is back, he is calling you to go to the main manor and greet the matriarch, since the elder master is currently busy and the third master is out of the house." 

Situ Mu Yan dropped his arm off his eyes, his lips curled up in a mocking sneer as he nodded to himself and then answered,  " I got it, I will be there."