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These days, fireworks are a big business and there are now over 800 fireworks companies in the Liuyang area.
現在的煙花可是門大生意，瀏陽地區現有煙花公司800多家
Dancing Fireworks is a 20-year-old family run company. It now employs 1,600 people.
東信煙花廠是一家20年的家族企業?，F在有雇員1600人
By far the most popular fireworks the Dancing factory makes are what are known as display shells.
目前東信煙花廠制造的最流行的煙花就是所稱的禮花炮
These are for huge events like the Beijing Olympics, which Dancing supplied.
像北京奧運這種大活動用的就是東信的禮花炮
Display shells like the ones in this wirehouse got to 300 metres and explode into massive starbursts.
這房子里的這種禮花炮能打上300米高，爆成大片火花
And they are still largely made by hand in factories like this.
而它們仍然多數采用手工制作，工廠就像這樣
The workers at Dancing produce an extraordinary 2.7 million shells a year, that's one shell every 12 seconds.
東信的工人們每年驚人地生產270萬花炮，相當于每12秒造一發花炮
Each shell is made of a dome of pressed cardboard, with a time delay fuse stuck in with string and glue.
每個花炮都用球狀紙板包住，塞進延時引信后，再用繩子和膠水封住
The Dancing factory doesn't just assemble fireworks, it also comes up with new designs for the global market.
東信煙花廠不僅組裝煙花，它也會迎合全球市場推出新設計
One of the main ingredients used make gunpowders is a chemical called saltpetre.
制作火藥的一種主要原料，就是一種化學品叫，硝
They use to get it from bat droppings found in caves.
以前是要到洞穴里從蝙蝠糞中提取的
Nowadays, they make it synthetically but the principles are about the same.
現如今可以靠人工合成了，但背后的原理也差不多
The science behind fireworks, however, that's really involved.
然而煙花里面的科學才是真正重要的
And I've been given special permission to come here, to the factory development lab to take a look.
我得到特殊允許來到這里，進入工廠的實驗室一探究竟
