Recently, online hike-sharing has become the new favorite in China. In major cities, bikes in, yellow, orange, blue, white and green, can be seen almost everywhere on the street. It seems that these bikes appeared suddenly, adding a new beautiful scenery to Chinese cities.

    Both the market and the public welcome online bike-sharing, but is it really a promising business? Well, it depends. After all, online bike-sharing platforms can never get away with huge operating cost and uncertain government policy.

    Some theorists might say that online bike-sharing platforms can earn a fortune simply through deposit. Since users will always need to rent bikes, their deposit will always be kept to online bike-sharing platforms.

    However，although online bike-sharing platforms may be able to use the deposit for other purposes at the primary stage, they will have to set up a special account, so that the deposit shall be used specially for its designated (指定的) purpose. As the market gets increasingly mature, they will have to do so whether to be responsible for users or in consideration of possible government regulations.

    Now that online hike-sharing platforms can，t make profit through deposit，how can they become profitable as fiercer market unfolds? Although Hu Weiwei, CEO of Mobike, stated in an article that she would take Mobike as charitable(慈善的) project if she failed, running a startup is absolutely different from managing a charity organization. After all , she has to pay back investors' billions of investment(投资).

    To make profit, online bike-sharing platforms might have toincrease rent fee for each trip, just as Didi did

    From this aspect, it might be a really good business. If we consider full screen ads fee, recommendation fee for business owners, etc. , its annual income might reach at least RMB 15 billion. If we consider the huge operation cost, including bike repairs，bikes' service life and labor cost, there might not be much net profit left. After all, offline operation cost has always been an unbearable burden for such internet plus mode-based startups.

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    New research brings some good news for lovers of spicy(辛辣的) foods, after finding that eating hot red chili peppers might help to extend lifespan（寿命）.

    Consuming hot red chili peppers might reduce death risk, say Chopan and Littenberg from the research team. In hot peppers, such as Mexico peppers, the strong flavor comes from a compound(复合物), which does not exist in sweet peppers or onions. Studies have suggested that this compound can offer a welth of health benefits.

    A study of more than 16,000 people in the United States revealed that individuals who consumed red chili peppers had a lower risk of death from all causes over an average of 18 years than those who did not eat the spicy food. Compared with participants who did not consume hot red chili peppers, those who did were found to be at 13 percent reduced risk of all-cause death.

    For example, a recent study reported by Medical News Today, found that the compound might have the potential to stop breast cancer, while an earlier study linked the compound to a reduced risk of digest system cancers. Still, the available data suggested that hot red chili pepper consumption was most strongly associated with a reduced risk of death from heart disease.

    While the researchers are unable to identify the concrete compound by which red chili peppers might extend lifepan, the team says that it is likely due to the compound that is effectively against obesity(肥胖症).

    Overall, the team says that these latest findings support those of the 2015 study, linking spicy food intake to reduced risk of death by showing “a significant decrease in death associated with hot red chili pepper consumption.” However, Chopan and Littenberg note that the earlier study was only conducted in Chinese adults, so the now research makes these findings more credible.

    Why do some people live to be older than others? You know the standard explanations: keeping a moderate diet, engaging in regular exercise, etc. But what effect does your personality have on your longevity? Do some kinds of personalities lead to longer lives? A new study in the Journal of the American Geriatrics Society looked at this question by examining the personality characteristics of 246 children of people who had lived to be at least 100.

    The study shows that those living the longest are more outgoing, more active and less neurotic（神经质的）than other people. Long-living women are also more likely to be sympathetic and cooperative than women with a normal life span. These findings are in agreement with what you would expect from the evolutionary theory: those who like to make friends and help others can gather enough resources to make it through tough times.

    Interestingly, however, other characteristics that you might consider advantageous had no impact on whether study participants were likely to live longer. Those who were more self-disciplined, for instance, were no more likely to live to be very old. Also, being open to new ideas had no relationship to long life, which might explain all those bad-tempered old people who are fixed in their ways.

    Whether you can successfully change your personality as an adult is the subject of a longstanding psychological debate. But the new paper suggests that if you want long life, you should strive to be as outgoing as possible.

    Unfortunately, another recent study shows that your mother's personality may also help determine your longevity. That study looked at nearly 28,000 Norwegian mothers and found that those moms who were more anxious, depressed and angry were more likely to feed their kids unhealthy diets. Patterns of childhood eating can be hard to break when we're adults, which may mean that kids of depressed moms end up dying younger.

    Personality isn't destiny, and everyone knows that individuals can learn to change. But both studies show that long life isn't just a matter of your physical health but of your mental health.

    We all long for friendship, but how to make a friend? "The best time to make a friend is before you need one." Joy Steven said. The following are some tips for you.

    People equal friends

    Friends usually begin with strangers. Getting in touch with other people is the first step to make a friend. Friends can't be made in empty air. Best friends take time to make.

    Friends understand friends

    Friends understand each other when talking. Many unpleasant personal quarrels can be avoided if you will take the time to understand others' feelings and points of view.

    Friends touch friends

    Touching is a warm form of communication between friends. When you see best friends communicating, you will notice them stand close together, touch each other comfortably and listen to each other. Sometimes a friendly touch is more powerful than words.

    Friends praise friends

    Praise is a powerful tool to make a friend. Honest praise can affect (影响) your friends' lives. So try to praise your friends including your general ones.

    Friends can loyal (忠诚的) and trustworthy

    Trust and loyalty go hand in hand for friends. Friends can share secrets with you, because good friends never break confidence (信心) and are loyal forever.

    Annette Larkins is an incredible woman who looks like a healthy 40-year-old, although she just turned 70. She follows a special raw diet and only drinks rainwater.

    She looks so young that people mistake her to be the daughter, when she's out with her husband of 54 years, but I suppose he isn't complaining.

    Mrs. Larkins says the secret to her beauty lies in her special diet, consisting of organic vegetables, fruits, seeds and nuts grown in her own garden; she calls it the "fountain of youth". The woman doesn't touch anything that has been cooked.

    And another strange thing she does is to collect rainwater, to keep her garden blossoming, but also to drink. But the residents of Miami-Dade County, Florida, didn't always have such a healthy lifestyle. In fact, she consumed meat regularly, as her husband used to own a meat factory way back in the 1960s. It was then that she decided to change her eating habits forever. And what a great decision that was. I mean, just look at her!

    When she started off, Mrs. Larkins was just looking for a few health benefits and never anticipated that she would look like a 40-year-old at the age of 70. Over the 27 years that she has been eating raw, Mrs. Larkins has written two booklets railed Journey to Health and also produced a DVD containing all her healthy secrets.

    Her husband, Mr. Larkins, wishes he had followed her example, because now he looks much, much older and also suffers from diabetes (糖尿病) and high blood pressure. He takes prescription medicine every day, but Annette doesn't even take an aspirin.

If you walk slowly through downtown Helsinki(赫尔辛基) during the day,taking in the splendid 19th century buildings,white boats and noise of passing trams(有轨电车),you will start to understand why it is called a city of two colours:white and blue.

The sea is always present in Helsinki.When you take a walk over the great open space of the central square,you will hear seabirds screaming.When you take the tram,suddenly and unexpectedly,you are faced with a calm,shining blue sea.You may notice that people in Helsinki do not rush about as in other cities.Instead,walk along the roads,politely letting other people by.

A usual way to see Helsinki for the first time is to start out by the boats.You will walk by the elderly women selling fish and vegetables in the market square and find yourself in front of a beautiful park.You may enjoy a pleasant walk in the park for a few hours and then take the tram.Trams are the perfect way to get around in Helsinki.Watching the old houses,parks,theatres,churches,shops,restaurants and people in the streets,you may have a slightly sad film feeling to it.

The pale summer nights are another wonder in the city.Following waterfront(滨水区) of the city after sunset,you couldn't help stopping and listening to the sweet silence,interrupted only by the screaming seabirds and leaving fishing boats.

However,in some way,Helsinki is also the most modern city in northern Europe.You will surely want to visit the white Glass Palace,the art museum,all those extremely popular cafes and design stores.