You may know a lot about smartphones. But what about smart cities?

Imagine living your life like this: When you wake up in the morning, you say "Open the window" to the computer and it opens the window. The sunshine is shining and the birds are singing. Then you finish breakfast and sit in front of your desk and begin to have classes through the Internet. With the help of building a smart city, this may become true one day.

A smart city uses digital technologies(数字科技）such as the Internet to improve city planning, save resources(资源) and make our lives easier. For example, people live in smart cities, where there is Internet almost everywhere. They can do many things at home, such as booking train tickets, paying water bills and shopping online. What a convenient life it is!

Now China is making some cities smarter. For example, Guiyang is going to build free Wi-Fi in the whole city. Tianjin plans to start a smart city program to solve traffic problems. Guangzhou is creating a smart city, so everyone in the city should play a role in creating a smart city.

    How green are you? Do you know how to be green?

    We all need a healthy environment, but we produce waste every day and it does harm to our environment. Though we are young, we can still do something to help. In fact, even the simplest everyday activities can make a real difference to the environment. Here are some ideas for you.

    Reduce

    Reduce means "use less". Don't waste things. This saves money and reduces pollution and waste going into the environment. Before we buy something new, think whether it is really necessary—or maybe the old one will be just as good! When we buy things, choose local products if possible, and try not to buy too many things from abroad.

    Reuse

    Reuse means "use again". Use things for as long as possible. When we buy things, make sure that they last a long time. We should look after them so that they will last, and we should repair them if we can instead of throwing them away and buying new ones. Don't use a paper cup or a paper bag. It's better to use a china (瓷器) cup and a lunch box because you can use them again.

    Recycle

    Recycle means "change things into something else". Though it takes energy to change something into something else, it's better than throwing things away or burning them. Find out what can be recycled in your neighbourhood and take part in recycling programmes. We should also buy products made from recycled materials, such as recycled paper, to help save trees.

    So please remember these three words: reduce, reuse and recycle.

Welcome to DL Angel City, a shopping center that welcomes visitors from near and far! We pride ourselves on offering a wonderful shopping experience. Here's a list that shows what is on each floor of Angel City.

We are here to make your shopping experience as enjoyable as possible. If you need any help or have specific requests, our friendly staffs (职员) are always at your service or you can go to the Customer Center.

People pay close attention to 5G these years. So, what is 5G? The "G" stands for(代表) the generation of your mobile network.5G is the 5th generation mobile networks and it's a hundred times faster than 4G.

The first 5G video call was made on a Huawei Mate X smartph one on March 30, 2019. Shanghai has also become the first city in China to start testing 5G networks. Monaco became the first country in Europe to use a next-generation 5G mobile phone network based on technology from Chinese company Huawei.

It sounds obvious, but it's important to understand just how much faster 5G is compared to current 4G speeds. 5G will not only be many, many times faster than your existing connection, and it will be greatly faster than the broadband connection you have at home.

Now, 4G takes about 100 to 200 milliseconds to send and receive data. But 5G will get it down to 1 millisecond or less. This big change will not only make our mobile Internet faster. It can be used in many other ways as well.

For example, 5G will help make self-driving cars safer. Today's self- driving test cars have one problem—lag. When the car "sees" an obstacle(障碍), it sends this information to a data centre and receives instructions. However, it takes time to send and receive this information. With this kind of lag, the cars might crash because they don't receive instructions in time. With 5G, this lag will be greatly lowered, making the cars safer, according to CNN. 5G could also be used to power the Internet of Things (IOT). This refers to a large online network that connects all things and people. Fast Internet speeds will be the key to developing this technology. For example, with IOT under 5G, your fridge could automatically(自动地) place an order online for eggs when it finds that there are no eggs left inside.

All in all, 5G will shape every type of technology that it touches. And you won't have to wait too long for that to happen. Though we've seen a lot of positive progress just in the last year, we still have a long way to go before 5G is anywhere near as common as 4G is right now.

From food lovers to exercise and travel partners(同伴), young people have been looking for new ways to connect with others and share their hobbies. A popular way to do so is through dazi socializing(社交). 

The word dazi comes from the Shanghai dialect(方言). People first used it to talk about card-playing friends. Now, it refers to(指代) the partners who take part in certain activities together. And a dazi is not like a close friend. People usually don't have a long and strong relationship with their dazi. 

Recently, more people are trying to seek a dazi to enjoy food, go on a trip, or study together. Xiaomi is one of them. 

Xiaomi, born in 1981, is an office worker in Shenzhen. She has looked for travel partners more than once. This March, Xiaomi went to Gansu Province and found a travel partner there. She also found another dazi during the trip. The three had a good time together during the journey. 

"We later started a chat group on WeChat, and we often shared good books. Starting as travel partners, we have become friends. I think I'm lucky!" Xiaomi said. 

However, the dazi culture doesn't come without risks. Although looking for a dazi is not difficult, finding a perfect or nice dazi is not easy. Remember to be careful and pay attention to personal safety when looking for a dazi. 

 Earth Day, which falls on April 22, is a day to call on more people to protect the natural world. This year's theme"Planet VS. Plastic" is especially important because plastic is harming our environment in many ways. Plastic doesn't break down easily. {#blank#}1{#/blank#} To fight against plastic pollution, we all need to do something.

 Governments can make rules to limit(限制) the use of plastic and encourage people to recycle. Businesses should find ways to use less plastic or use recycled plastic instead.

International cooperation (合作) is of great importance, as many environmental problems need worldwide support. {#blank#}2{#/blank#}

 Schools can help too. {#blank#}3{#/blank#} By taking part in activities like zero-waste events at school, we will be more likely to make proper choices in our daily lives. We can also share what we know with our friends and families.

{#blank#}4{#/blank#} We are advised to use reusable shopping bags and glass bottles instead of plastic ones. It's a good idea to try to buy something without a lot of plastic packaging(包装). Even small changes in our daily habits can be helpful.

 Earth Day is a perfect chance to have our voice heard. {#blank#}5{#/blank#} Let's work together towards a greener planet.