This trick of calling out and responding was frequently practised as is seen in the following cases: A high government dignitary called upon Ungo Doyo (Yün-chü Tao-ying) and asked[6.72]: “I am told that the World-honoured One had a secret phrase and Mahākāśyapa did not keep it hidden; what was the secret phrase?” The master called out, “O honoured officer!” and the officer responded. “Do you understand?” demanded the master. “No, Reverend Sir!” was his natural answer. “If you do not understand, there is the secret phrase: if you understand, there is Mahākāśyapa in full revelation.” Haikyu (P‘ai-hsiu)[6.73] was a local governor in Shinan (Hsin-an) before he was appointed a state-minister. He once visited a Buddhist monastery in his district. While going around in the premises of the monastery, he came across a fine fresco painting and asked the accompanying priests whose portrait this was. “He was one of the high priests,” they answered. The governor now turned towards them and questioned, “Here is his portrait, but where is the high priest himself?” They all did not know how to answer him. He then further asked if there were any Zen monks about here. They replied, “We have recently a new comer in this monastery, he does some menial work for us and looks very much like a Zen monk.” He was then brought in the presence of the governor who at once spoke to him, “I have one question in which I wish to be enlightened, but the gentlemen here grudge the answer. May I ask you to give me a word for them?” “I humbly wish you to ask,” politely requested the monk. The officer repeated the first question, whereupon the monk loudly and clearly called out, “O Haikyu!” Haikyu responded at once, “Here, sir!” “Where is the high priest now?” cross-questioned the monk. This opened the governor’s eye to the sense of the monk’s counter-question, in which he could now read the solution of his first query.