the size of 100 football fields, the harbin ice and snow world is a winter wonderland.at. because i have no hair. >> reporter: so is this the same hat that you wear in boston. >> no, they would be laughing at me. the architect who designed it all -- how long does it take you to build all of this? >> less than two weeks. >> reporter: you build all of this in less than two weeks? this year's theme is rather politically appropriate for china. that belt and road initiative is one of president xi jinping's most important projects, to build roads and train tracks all around the world, to step up his country's trade. as the temperatures here rise, all of these buildings and sculptures will melt back into the ground. less than a year from now, the river will freeze as it always has so the workers can cut again. for "nightline," i'm bob woodruff in harbin, china. >> can hardly wait to see what they do next year. you can see reports from bob woodruff at abc.com/features. >>> next, send in the clones. how barbra streisand says she created two very familispecial s from a familiar f

this is harbin, china. the average temperature in winter, 11 degrees below zero fahrenheit.is the city of ice. everywhere. so here's downtown harbin with the park made out of ice. the building blocks come from here. by december, the river flowing through the city completely freezes over. it's like diamonds of ice. the men and women of harbin literally carve the blocks of ice from the river. come on, pay me. i just worked. this woman run the ice carving business started by her father. today she's on deadline. going to drink beer? >> he has a team of about 100 workers. each day they rise before 4:00 a.m. cutting and hauling up to 1,000 blocks until sunset. here it's still grueling physical trade. push aside the snow, cut the frozen river into a grid, then huge blocks. each of these blocks weigh at least 2,000 pounds. so you have a 19-year-old son. do you think he'll work here, too? u.s. army. this man has been doing this for 20 years. has anybody ever been injured doing this? but as we saw, even one slight slip by these veterans can be dangero dangerous. here the worker's foot

this is harbin china. average temperature 11 degrees below fahrenheit.s is the city of ice every ware. >> so here's downtown harbin. >> reporter: the building blocks come from here. the men and women of harbin literally carve the blocks of ice from the river. it's still grueling physical trade. push aside the snow, cut the frozen river into a grid and huge blocks. each of these blocks weigh at least 2,000 pounds. john has been doing this for 23 years. trucks then deliver the ice into storage. no further refridgeeration required. here in the backyard of the festival, they wait to be turned into pieces of art. i don't know how long it takes them but they put each of these castles together, block by block. >> during the day it's like a frozen lost city. when the sun goes down, the ice city really comes alive. the ice lit up by led lights can be of any shape and any color. the size of 100 football fields, the harbin ice and snow world is a winter wonderland. shuya is the architect who built this all. you build all of this in two weeks? >> all of it. >> repor

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the harbin ice and snow world is a winter wonderland. this is the architect who designed it all.take for you to build all this? >> two weeks. >> you build all of this in two weeks? >> all of this. >> reporter: as the temperatures here rise, all of these buildings and sculptures will melt back into the ground. i'm bob woodruff in harbin, china. >> beautiful. >> it looks beautiful, but it looks absolutely cold. >> well, it's made of ice. that's how it works. >> is that how it works? >> yes. >> so, next you're going to say the temperatures are less than 32 degrees. >> probably. >> fahrenheit. >> there are apparently different theories about why the ice is so transparent. they say maybe the river is just naturally that blue and clear. they also say each block of ice is formed from the river and then clean water from a deep well gets everything in place. >> fascinating. >> yeah. >> did you see something just now? >> yeah, the ice sculpture on tv. >> huh. >> we'll be right back. did you see something just now? you wouldn't accept from any one else. so why accept it from your allergy pi

harbin northeastern china. in the one nine hundred thirty s. and one nine hundred forty s. japan occupied this part of china. inside these brick buildings a division of the imperial japanese army unit seven three one carried out grotesque human experiments as a result japan became the first country ever to perfect the technology of biological warfare. agents in this. city and to chen. said early. on the. theory. helen said only all. color to mean. the trash the japanese experiments exposed to their living victims insects or shellfish infected with plague anthrax and cholera while weapons experts created unique bombs to deliver these pathogens to their target during world war two japan dropped thousands of these bombs throughout northern china infecting towns and villages with plague cholera anthrax and tie for you to see. him as a woman the powerful that they don't unit seven three one was run by japanese scientists and led by general shiro. yet despite clear evidence. that unit seven three one used biological warfare on such an industrial scale after the war now the shira

in harbin. he doesn't quite get it. shall come from? i don't know. we will look into that guinea fowl later on! when you say a park, dear me a wildlife park? just a public park? i have another guinea pal story for you. but before guinea fowl. last week we went to dinner, didn't we. it was a lunch. we all turned up late and dinner was on the table and we all thought it was chicken that would later found out it was guinea fowl but we ate it anyway. i did know. that is my list of great stories. thank you, dan. 623, you were watching breakfast. the use of a breakthrough drug, which is the first to tackle the root cause of cystic fibrosis, will be debated by mps later today. 0rkambi is available in several countries including ireland, germany, and the us, but it's not used on the nhs because it costs 100,000 pounds per patient, per year. brea kfast‘s graham satchell has more. lucy is doing a special workout to help her condition. she has cystic fibrosis, and inherited illness that affects lung and digestive system. fibrosis,