Experts told a committee why the fire at Wang Fuk Court moved so quickly.

專家向委員會說明了旺福苑火災為何蔓延得如此迅速。

Professor Usmani studied the building. He said the building has special open spaces. These spaces worked like chimneys. They pushed hot air and smoke up to the top floors very fast.

Usmani 教授研究了該建築。他表示建築物內有特殊的開放空間，這些空間就像煙囪一樣，將熱空氣與煙霧迅速推向頂層。

There were also dangerous materials on the walls. Workers used wood, cardboard, and foam. These things burn easily. The nets on the building also caught fire.

牆上還使用了危險材料。工人使用了木材、紙板和泡沫，這些物質極易燃燒。建築物上的防護網也起火了。

Professor Usmani wants new rules. He says buildings must not use materials that burn during repairs. He also wants better windows and more checks on building work.

Usmani 教授希望能制定新規定。他表示建築物在維修期間不得使用易燃材料。他還希望改善窗戶品質，並對建築工程增加更多檢查。

The group will finish its report in mid-July.

該小組將於七月中旬完成報告。