The Big Three Dragons might be impressive, but correspondingly, this hand type is too heavy, and it's not that easy to win with it... especially when your opponents know roughly what cards you are looking for.
Tang Weizhi's hand indeed had the foundation of the Big Three Dragons, but to be ready to win, he would need to draw useful cards for at least three or four turns in succession.
As long as Murong Ji and Liu Ming managed to win before he was ready, Tang Weizhi's hand would be no more than a flower reflected in a mirror or a moon's reflection on the water, an effort fully wasted like a basket dipped in a pond only to come out empty.
