it's the expo in shanghai, the latest world's fair. mingzheng shi is the director of new york university in shanghai. >> china wants to show off, show off to the world that china is now in the league of the family of nations because in the past, expo was only held in developed countries. this is the first time that a developing country is doing it. so for the great mission of getting china up there in the world of families, is a big, big deal for china. >> reporter: $4 billion spent directly on the fair. more than $50 billion spent to improve the city's infrastructure. shanghai has bet big on the fair but it's not alone. china's trading partners have built elaborate pavilions, going to great lengths to boost their image in china. ted fishman is an author specializing on the chinese economy. he says by creating expensive exhibits, countries wishing to court china's strong export economy and huge consumer market have followed the long-standing tradition of bringing gifts and bong to the emperor. why did countries feel like they had to be

my sister-in-law and his two kids were on a plane going from here to shanghai, didn't make it. >> thisa cancer which often affects people at the prime of life, between 30 to 60 years of age. >> reporter: dr. so has been leading efforts in the san francisco bay area and around the world to raise awareness about help b. he has a research lab at stanford focused on finding new ways to diagnose and treat liver cancer. there's no cure for hepatitis-b, although the virus can be kept in check with antiviral medicines. those infected need to have yearly ultrasounds and blood tests to screen for early stages of liver cancer. dr. so is the founder of the asian liver center, dedicated to create awareness about hepatitis-b, both in the u.s. and overseas, especially in china. >> a hundred million people in china are chronically infected. so it's a huge burden of disease in china every two three minutes someone in china is dying from liver cancer caused by this virus which could be prevented by a vaccine. and still most people in the world are not vaccinated against it. it's just ridiculous. >> repo

at weight watchers in shanghai, program director works with clients to limit the amount of food at meal time. >> unlike the western countries where people are very used to cups, spoons, teaspoons or tablespoons we don't have that. it's hard for people to find out how much they have eaten. >> suarez: chinese meals are often eaten from serving dishes in the middle of the table for all to share. people eat straight from the communal server until the food is gone. how would you know how much you've eaten? it's tougher to limit your portions. >> estimation we would ask them to put their foods... on the plate in front of them. s so that they could have a portion. they could get a sense of their portion before they eat it. that would also slow the process down. so we're asking people to change their eating behavior a little bit, a tiny little bit. >> suarez: the dramatic increase in obesity here has been followed by a similar jump in the number of type 2 diabetics. in fact china is now home to the most cases of diabetes worldwide. experts worry about the implications that has on the country's

china's going to slow down there are a lot of questions about the potential for global growth so the shanghai markets sold off. european markets followed. then the u.s. markets followed because of that consumer confidence report that came out showing a big drop in consumer confidence. guess what the big worry is there? jobs. everybody is worried about the outlook for the job market. >> sreenivasan: is that consumer confidence number reflective of what's been happening to the overall market. it's been six months and down about 12%. a lot of times the market seems to be going side ways. >> if your house is worth less and the prices are down your stock portfolio is less your confidence about growth in the future becomes, you know, worrisome. the big question now is will i be able to get a job? will i be able to keep my job? there's an important jobs report coming out this friday. it's expected to show that the economy lost jobs in june. this will be the first time for this year. that's worrisome. the headline numbers 115,000 jobs lost. you have to remember some of that is primarily due because o