Nov. 21 is World Hello Day. It began back in the 1970s as part of an effort to make the world more peaceful. It was created by the United Nations just after the war between Israel and Egypt in 1973. The philosophy (理念) behind it is: Say “Hello” and stop war.

    It sounds like a fine idea, but most of us know that simply saying “Hello” won't bring about world peace. Still, on a smaller range, the simple act of saying hello to someone can make a lot of difference.

    This might not be obvious. After all, it's such a casual thing and requires so little effort. You raise your head to someone as you pass by them in the school corridor (走廊), say “Hello' then it's over.

    Although we might not realize it, a small thing like a greeting can mean a lot to a person. Many people are lonely because they're shy. They find it difficult to communicate with people, even though they want lo. It leads to them feeling cut off.

    On this basis, maybe it's a good idea, not just on Nov. 21, but every day, to remember to say “Hello” to as many people as we can. The stranger who hears your greeting may secretly smile in their heart. You might even make their day.

    Greeting other people is the easiest way to be polite. Politeness is the way we individual humans link up with the rest of the human world outside of our circles of family and friends. Politeness is one of the aspects of culture that make us a society rather than just many individuals living in the same space.

    No one said it better than the French author Joseph Joubert: “Politeness is the flower of humanity''. A “Hello” to a stranger is a small thing, and often neglected (忽视), but through it we can make the world better for another person.

    You probably know who Hillary Diane Rodham Clinton is, but you may not have heard of Margaret Munnerlyn Mitchell if you are not interested in foreign literature. Of the outstanding ladies listed below, who is your favorite?

    Jane Austen (16 December, 1775-18 July, 1817)

    Jane Austen, a famous English writer, was born at Steventon, Hampshire. She began writing early in life, although the prejudices (偏见) of her times forced her to have her books published anonymously (匿名).

    She wrote many books of romantic fiction about the gentry (贵族). Her works made her one of the great masters of the English novel. Only four of her novels were printed while she was alive. They were Sense and Sensibility (1811), Pride and Prejudice (1813), Mansfield Park (1814) and (1816).

    Charlotte Bronte (21 April, 1816-31 March, 1855)

    She first published her works, including Jane Eyre, under the false name of Currer Bell. Her first novel, The Professor, was rejected by many publishers. It was not printed until 1857. She is famous for her novel Jane Eyre (1847), which was very popular when it was printed. Jane Eyre was a strong story of a plain, brave, clever woman struggling with her passions, reasons, and social condition.

    Margaret Munnerlyn Mitchell (8 November, 1900-16 August, 1949)

    She was an American author and journalist, a lifelong resident and native of Atlanta, Georgia. One novel by Mitchell was published during her lifetime, the American Civil-War-Era novel, Gone with the wind, for which she won the National Book Award for Most Distinguished Novel of 1936 and the Pulitzer Prize for Fiction in 1937. In more recent years, a collection of Mitchell's girlhood writings and a novel she wrote as a teenager, Lost Laysen, have been published. A collection of articles written by Mitchell for The Atlanta Journal was republished in book form.

    Government in Tibet have denied the permanent( 永久的) closure of Mount Qomolangma National Nature Reserve.

    The announcement came after a report went viral online claiming the base camp of the world's highest mountain was "permanently closed due to heavy pollution" and caused a universal misunderstanding.

    Mount Qomolangma National Nature Reserve was set up in 1988. Covering an area of more than 33, 800 square km, it is home to one of the world's most weak ecosystems(生态系统).

    Kelsang, deputy director of the reserves administration, said ordinary tourists are allowed to visit areas around Rongpo Monastery, almost 5,000 meters above sea level. As for travelers who have a climbing permit, they can go to the base camp at an altitude of 5,200 meters. The mountaineering activities have been permitted by the regional forestry department.

    To conserve the environment surrounding Mount Qomolangma, China carried out three major clean-ups at an altitude of 5, 200 meters and above last spring, collecting eight tonnes of household wastes, human wastes and mountaineering trash. This year, the clean-up will continue, and the remains of mountaineering victims(受害者) above 8,000 meters will be centrally dealt  with for the first  time. Meanwhile, the number of people who stay at the base camp will be kept under 300.

Recently, there are 85 wildlife protectors in the reserve, and 1,000 herders have part-time jobs going around and cleaning up garbage.

These measures aim to strike a balance between various demands such as environmental protection, local poverty relief, mountaineering and education, said Wang Shen, county chief of Dingri at the mountain foot.

    A young woman sits alone in café sipping tea and reading a book. She pauses briefly to write in a nearby notepad before showing her words to a passing café waiter: "Where are the toilets please?" This is a familiar scene in Tokyo's so-called "silent cafes", where customers are not allowed to speak, and only communicate by writing in notepads.

    The concept rises by a desire to be alone among young Japanese, a situation brought by economic uncertainly, a shift in traditional family support structures and the growing social isolation. The phenomenon is not limited to coffee shops but covers everything from silent discos, where participants dance alone wearing wireless headphones connected to the DJ, to products such as small desk tents designed for conversation-free privacy in the office. One Kyoto company even offers single women the opportunity to have a "one woman wedding" – a full bridal affair, complete with white dress and ceremony, and the only thing missing is the groom. The trend has its own media expression – "botchi-zoku", referring to individuals who consciously choose to do things completely on their own.

    One recent weekday afternoon, Chihiro Higashikokubaru, a 23-year-old nurse, travelled 90 minutes from her home, to Tokyo on her day off in order to enjoy some solo time. Speaking quietly at the entrance of the café, Miss Higashikokubaru said: "I heard about this place via Twitter and I like the idea of coming here. I work as a nurse and it's always very busy. There are very few quiet places in Tokyo, and it's a big busy city. I just want to come and sit somewhere quietly on my own. I'm going to drink a cup of tea and maybe do some drawings. I like the idea of a quiet, calm atmosphere."

    The desire to be isolated is not a new concept in Japan, home to an estimated 3.6 million "hikikomori" – a more extreme example of social recluses（隐士）who withdraw completely from society.

    There was once a man who had a donkey and a beautiful lapdog. The donkey was kept in a barn and had plenty of corn and hay to eat. Indeed, he was just as lucky as any donkey could be. The little dog stayed in the house and was well liked by the master. He was always playing and jumping about in an funny way and was allowed  to lie in his master's lap (膝盖). Meanwhile, the donkey had plenty to do. He pulled wood all day long and had to take his turn at the mill during the night. He often complained about his problems, and it bored him to see the lapdog living such an easy life, while he had to work so hard. Finally he thought to himself that if he acted the same way as the lapdog to his master, he would be treated the same way. So, one day he ran out of his barn and went fast into the house, where he began to kick about in a very strange way. Then, swaying his tail and imitating the funny behavior of the pet lapdog, he knocked over the table where his master was eating. He also broke all the dishes into very small pieces and did not stop until he jumped onto his master, trying to lick and paw him with his rough feet.

    Seeing their master in great danger, the servants thought it was time to help him. They beat the foolish donkey with sticks until he could not get up again. As he was about to die, he cried, "Why couldn't I have remained satisfied the way I was? Why did I try to imitate a creature who was nothing but a lazy puppy after all?"

Isatou Ceesay was born in 1972 in a small village in Gambia, Africa. As a teenager, Ceesay was forced to drop out of school because of poverty. She carried some goods with many girls like her to sell in the market to raise herself At that time, the plastic bags, being strong and light, became popular in Gambia. The problem was that people did not reuse the bags and simply threw them behind their homes. Over time, the houses were surrounded by trash.

Ceesay lived in such an environment for many years. She kept learning from the surrounding environment and planned to take action to change. In 1997, she started a recycling movement called One Plastic Bag in Gambia. She educated women in Gambia to recycle plastic waste into income for themselves. In the beginning, the movement had a mission to educate their village colleagues about the need to reuse garbage and recycle plastic waste, rather than letting the garbage increase behind their homes.

Over time, the movement became big and able to support and provide income for women around. It was also able to greatly reduce plastic waste in Gambia. But the work of collecting trash turned to be taxing. During the rainy season, plastic waste became wet and difficult to take, and after that it still took patience to dry it before it could be processed.

Ceesay said, "As a habit, people are used to pouring their garbage behind their houses, and because it is not visible, they forget it. But the bad effects again knock on your door very quickly — dirty air, various diseases and so on. Of course, if one man's house is clean but his neighbor's is not, then the man is also not healthy."

For 17 years, Ceesay has contributed to one of the most important problems about the plastic waste. In 2012, she got the TIAW Difference Maker Award in Washington, DC, United States. Her story was written into a book, which inspires many others to join or become makers of change in their own communities.