nhk world's takafumi terui reports. >> reporter: chinese officials announced their 2030 reduction target for greenhouse gases during the premier's visit to japan. >> translator: we must cut carbon emissions by 60% to 65% compared to 2005. >> reporter: but this figure is pre-unit of gdp. which means it could increase as the economy grows. premier li says china's overall emissions will rise until 2030. but at a lower rate than before. he said then they begin to decline. the country's co2 output has more than tripled between 1990 and 2012 while globally the number has ridden by just 50%. china now accounts for a quarter of all global emissions relying heavily on coal burning for electricity and other purposes. introducing renewable energy as one of the key ways to reduce greenhouse gas emissions at this company that's located in a historic part of beijing. officials have set up rooftop solar panels. this firm was set up in 2010 through a state-owned company. in five years its launched solar power projects in 50 places across the country. the work is subsidized by the chinese government. uni

our reporting in beijing takafumi terui is following developments there. >> i think this has been a very tense week for many individual investors in china. i talked to several in beijing. >> translator: the value of my investment dropped to $11,000 at one point. then it went back up to $19,000. but now it's dropped again by about 50%. >> translator: i was planning to take a trip but now i can't. i've lost enough money to buy a house. i'm just lucky i haven't been forced to live on the streets. >> translator: i wish the government would come up with some effective meares to minimize our losses. and fast. >> in china there are many more small investors than institutional ones. 80% of investments are made by individuals. most of them borrowed the money they invest through a system called margin financing. and it's partly responsible for the recent crash. under this system the money in an investor's account is useds collateral for loans from the brokerage firm. so it's possible for investors to trade and risk more than they have in their accounts. this a finance specialist at peking universi

our takafumi terui has been following the story. he explains why the treatments currently offered in china aren't working. >> many patients i met at the hospital said their doctors don't spend time explaining health conditions limited to them. so they have to rely on themselves for treatment. they find it very difficult and feel helpless. also treating patients as a team like we saw in the report is unusual in china. without looking into details of the patient's lifestyle. the biggest advantage of team treatment is that a specialist spends time with the patient to determine the right remedy. so the patient knows exactly what to be aware of. chinese doctors and medical staff were impressed by the treatment. training local staff will be the key to providing the same quality of expertise and services to chinese patients. the japanese specialists would need to do so until the locals become able to train others. once that happens, dr. iizuka and her team can cut back on their visits and offer help only when necessary. meanwhile, the japa

takafumi, what's the reaction there to the games coming back? >> reporter: good evening, james. as you might expect, it's like the whole country is beaming with pride. state run tv showing coverage of the meeting in malaysia. on a special live program right now, the presenters expressed joy when beijing won. the country's organizing committee said they will reuse existing facilities so that should keep costs down. but government officials and business people are also hoping that the games will lift the country's slowing economy. development projects are already under way in zhangjako, the site of some ski events. construction for high-speed trains to link the city with beijing. hotels and apartment buildings are springing up as well. locals say over the last few years buildings have replaced fines. there's still challenges. ioc members pointed to beijing's lack of snow. they say they will use machines to build it. they are using pipeline for water reservoirs. air pollution is an issue. government leaders say they will improve things in that area, too. china's national pride will