What do you use to unlock your cellphone? A password? A fingerprint? Or simply a glance?

    On September 12, 2017, Apple introduced its iPhone X, which has an eye-catching feature—Face ID.

    With Face ID, Apple says, you can unlock your new iPhone by just looking at it. It is powered by a so-called TrueDepth camera system built into the front of the iPhone X.

    When the camera system sees a person's face, it uses 30,000 unseen dots to “map” the shape and outline of the face. A mathematical model of the face will then be created and stored in the phone.

    The next time the person looks at the iPhone X, the same dots are mapped onto his or her face and compared to the stored model. If the two match, then the phone unlocks. This happens in less than a second.

    Apple says the system is smart. If you change your hairstyle, put on sunglasses or makeup, or use the phone in the dark, Face ID still works.

    Although the technology sounds fancy, there are still concerns. For example, will Face ID work for twins?

    According to Apple, the chance of others to unlock your iPhone X using Face ID is one in a million. Face ID can tell the difference between twins, but the error rating（出错率）rises. So one would need to set a password then.

    Apple also emphasizes that Face ID only unlocks when you stare at it. It is what Apple calls “attention aware”. So the phone won't unlock if you are just glancing at the phone for the time. It won't work either if someone puts the phone at your sleeping face or your photo.

    Below are some best special interesting holidays─all are new for 2017 and have high quality guides or tutors and strong programmes.

    Holland in bloom river cruise (巡游) with Alan Titchmarsh

    Alan Titchmarsh is the star attraction on this river cruise. Alan joins you for a visit to the magnificent Keukenhof Gardens─home to 800 varieties of tulips (郁金香).The Telegraph's gardening expert will talk about the best new varieties and the garden's history.

    April 19, £1,495 including flights from the UK and some meals. Telegraph Tours (0161 236 2444; telegraph.co.uk/titchmarshtour).

    Morocco Sketchbook

    Led by artist Maxine Relton, this tour takes in Marrakesh helping you develop your drawing skills. Rapid line and figure drawing and colour mixing are all covered and the eight-day holiday is based in Kasbah du Toubkal.

    May 8, £2,495 including some meals. Steppes Travel (01285 601 495; steppestravel.co.uk).

Ballroom and Latin American dancing in Tenerife

    This travel provides daily dance tuition with David Bowie who'll be on hand to teach dancing techniques. It is aimed both at the beginners and more experienced dancers looking to improve their skills. There'll also be time to explore the island on foot or play a round of golf.

    April 26, £769 full-board. Saga (0800 096 0084; travel.saga.co.uk).

    Fishing in Northern Argentina

    This nine-day fly fishing and conservation tour takes in the Iberá Marshlands, the world's second largest wetlands. Here expert fisherman, Charles Jardine, is the guide as you fish. Based in Estancia Rincon del Socorro, the holiday also includes opportunities for horse riding and bird-watching.

    October 15, £5,095 full-board. Cazenove + Loyd (02038135082; cazloyd.com).

    Winter solstice(冬至), an important solar term in the traditional Chinese calendar, as the name implies, means the coming of winter. It generally occurs between December 21st and 23rd. According to the traditional Chinese calendar, one year is divided into twenty-four solar terms. On this day, in the Northern Hemisphere the period of daytime is the shortest of the year and the period of night is the longest.

    In Northern China there is a custom of eating dumplings during winter solstice. The tradition of eating dumplings during winter solstice has its origin in early times. It is said that dumplings were invented by Zhang Zhongjing, a well-known doctor from the Eastern-Han Dynasty.

    One winter, he noticed that many people's ears were frozen, which made him sad. In order to prevent and cure the freezing injury caused by the cold, he asked his followers to boil mutton, chilies and other ingredients with medicinal properties in a pot for fending off cold. After these were boiled, they ladled(舀取) the mutton and other ingredients out of the pot, cut them into pieces, and then wrapped them with dough skins in the shape of ears. Afterward, they put these into pots to boil again.

    On the day of the winter solstice, the people whose ears were frozen were sent to eat the dumplings. People who ate it felt warm from head to toe and had their cold injury healed. Thereafter, every winter solstice people ate dumplings. Then there became a saying that if you eat dumplings during the winter solstice, then you won't freeze your ears off.

    Afterwards, Zhang Zhongjing died on the day of winter solstice. In order to honor him, every year on the day of the winter solstice every household makes dumplings.

    Writing Contests, Grants & Awards in 2019 The Writing Contests, Grants （补助金） & Awards database includes details about the creative writing contests-including poetry contests, short story competitions, essay contests, awards for novels, and more-that we've published in "Poets & Writers Magazine" during the past year. We carefully review the practices and policies of each contest before including it. Use the online submission system.

    Catherine Doctorow Innovative Fiction Prize

    A prize of $15，000 is given annually for a novel, or a story collection. U.S. writers who have published at least three books of fiction are qualified. Submit a manuscript （手稿） of any length, a brief biography, and a list of three previously published books of fiction with a $25 entry fee by November 1,2019.

    University of Alabama Press, P.O. Box 870380, Tuscaloosa, AL 35487.（773）702-7000.

    Walt Whitman Award

    A prize of $5,000 is given annually for a poetry collection by a poet who has not published a book of poems in a standard edition. The winning book will also be distributed to 5,000 members of the Academy of American Poets. Submit a manuscript of 48 to 100 pages with a $35 entry fee by November 1,2019.

    Academy of American Poets,75 Maiden Lane, Suite 901,NewYork,NY10038.（ 212）274-0343.

    Gabriele Rico Challenge in Creative Essay

    A prize of $1,333 is given annually for an essay. Using the online submission system, submit an essay of up to 5,000 words with a$20 entry fee, by November 1,2019.　All entries are considered for publication. Visit the website for complete guidelines.

    San Jose State University, English Department, One Washington Square, San Jose,CA95192.（408）924-4425.

    Brooklyn Nonfiction Prize

    A prize of $500 is given annually for a work of nonfiction that is set in Brooklyn, New York, and expresses the region's "rich soul and intangible （无形的） qualities through the writer's actual experiences of Brooklyn." Submit an essay of up to 2,500 words by November 15,2019.There is no entry fee．

    Brooklyn Nonfiction Prize, P.O. Box 491, New York, NY10156.（ 207）778-7071.

    Why do you go to the library? For books, yes--but you like books because they tell stories. You hope to get lost in a story or be transported into someone else's life. At one type of library, you can do just that--even though there's not a single book.

    At a Human Library, instead of books, you can "borrow" people. Individuals volunteer as human "books" and participants in the event can "read" the book--meaning they would have a one-on-one conversation with the volunteer and share in a dialogue about that individual's experience. "Books" are volunteers from all walks of life who have experienced discrimination (歧视) based on race, religion, class, gender identity, age, lifestyle choices, disability and other aspects of their life

For a certain amount of time, you can ask them questions and listen to their stories, which are as fascinating and as attractive as any you can find in a book. Many of the stories have to do with some kind of stereotype. You can speak with a refugee (难民), a soldier suffering from PTSD, a homeless person or a woman living with HIV. The Human Library encourages people to challenge their own long-held beliefs-to truly get to know, and learn from someone they might otherwise make a quick judgment about.

    According to its website, the Human Library is "a place where difficult questions are expected, appreciated and answered." It provides the opportunity for the community to share and understand the experiences of others in their community.

    The Human Library Organization came to be in Copenhagen, Denmark in 2000. Ronni Abergel, his brother Dany, and some colleagues hosted a four-day during a major Northern European festival, hoping to raise awareness about violence among youth. After the success of this event, Abergel founded the Human Library Organization, which has been growing ever since.

    Though there are a few permanent human libraries, most aren't places at all, but events. Though many do take place at physical libraries, you don't need a library card—anyone can come and be part of the experience. There have been human library events all over the globe, in universities and in pubs, from Chicago to Tunis to Edinburgh to San Antonio.

The stories these "books" tell range from fascinating to heartbreaking and everything in between. And that's the very point of the organization--to prove that no person can be summed up in just one word. It seeks to show people that you truly can't judge a book by its cover—or by its title or label.

    Tourist Guide To The National Gallery

    Opening hours: Daily 10am -6pm Friday 10amn-9pm

    Closed.24-26 December

    Reasons to visit

    With over 2, 300 paintings in the collection, there are hundreds of reasons to visit the Gallery

    Here are some to get you started……

    Get into great art. From Leonardo da Vinci to Vincent van Gogh. See priceless works of art for free……

    Get creative, Brush up your skills, and create your own great works of art……

    Lean about art. Discover more about paintings.

    Be inspired. Life, death, passion, beauty. Every painting tells a story.

    Relax. Escape from the noisy city into a painting

Regulations

    Talk in a low voice when you use your cellphone in the gallery.

    Not touching the paintings or other exhibits. Not taking pets in or crossing the barriers.

    Consuming food and drink in designated areas only, i. e. not in rooms that contain paintings

    Following our'no-smoking' policy in any part of the building.

    Following our'no –photography' policy in exhibitions where a sign is displayed

    Access:

    The National Gallery aims to make access to the paintings enjoyable and welcoming to the widest possible public. There are a range of facilities to help you see the collection, visit exhibitions and come to events

    The Gallery offers British Sign Language -interpreted As on paintings for visitors who are deaf, and special art sessions(展期)for visitors who can't see.

    Address: The National Gallery, Trafalgar Square, London WC2N SDN

    Getting here:

    By tube

    The nearest stations are Charing Cross( National Rail, Northern, and Bakerloo lines )and Leicester Square( Northern and Piccadilly lines)

    By bus

    Routes 3, 6, 9, 11, 13, 15, 23, 24, 87, 91, 139, and 176 stop at Trafalgar Square.

    By bike

    The nearest bike stands are on Orange Street, St Martin's Street, St Martins Place, and Duncannon Street

    Click here to find more information.