how do you define "ying"? maybe to you, all phra ngan is consider "ying" , then it is "ying". to people who know this master and pray to his phra ngan, they know this is 100% confirm not "ying". maybe if you have a chance, you can try to pray to his Phra Ngan, then you tell us whether it is "ying" or not. Master jo is a local master who has zero yin material is his Phra Chai/Phra Ngan.