In the past, people called out the ring number before it was launched--as a result, people scrambled for the popular numbers, leaving the also-rans untouched. This practice has been discontinued to increase competitiveness.
以往在引燃沖天砲之前，都會先叫簽號，這就形成搶熱門簽的人多、冷門簽沒人要的現象，於是後來決定不先報簽號，以增加競爭性。