Shinbyu opens with the boy dressed in royal finery, sometimes crowned and carried or mounted, and paraded through the community with music and family celebration, a deliberate reenactment of Prince Siddhartha's life at court before he saw the sights that led him to renounce it. At the monastery the finery comes off; his head is shaved by a senior monk, he is dressed in the plain robe of a novice, and he takes the going forth before a preceptor, receiving the ten novice precepts that will govern his conduct for as long as he remains ordained.
Melford Spiro's study of Burmese Buddhism situates shinbyu as the standard Bamar form of temporary novitiation, distinct from Poy Sang Long, the more elaborate Shan festival version of the same underlying practice recorded elsewhere in the atlas, which is typically organised collectively across a town rather than for one family at a time and dresses its novices with even more elaborate princely costume over several days beforehand. Both rites share the same doctrinal logic and the same Siddhartha reenactment, differing chiefly in scale, community organisation and ethnic setting. The costume, the procession and the shaving are staged publicly and draw the whole community's participation, while the precepts the boy then keeps inside the monastery are the same ten observed by any novice anywhere in the Theravada world, which ties an intensely local family celebration back to a shared regional tradition.