If you look at the top of your phone, you'll usually see a little symbol that says 3G or 4G. The "G" stands for the "generation" (代) of your mobile network. But the symbols will become things of the past after 5G networks fully arrive.

On March 30, Shanghai vice-mayor Wu Qing made the first 5G video call on a Huawei Mate X Smartphone. Shanghai has also become the first city in China to start testing 5G networks.

About 100 times faster than 4G networks, 5G will let people download and upload data(数据)     faster than ever before. But 5G won't just bring faster mobile internet. People can use it for many other things as well.

For example, 5G will help to make self-driving cars safer. Today's self-driving test cars have one problem-lag(延迟) . When the car "sees" an obstacle(障碍物) , it sends this information to a data center and receives instructions, However, it will be some time before it sends and receives 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.

5G could also be used to power the internet of things (IoT) , that is, a large online network that connects all things and people. Fast internet speeds will be the key to developing this technology.

The IoT could be used in a lot of ways. For example, with IoT, your refrigerator could automatically (自动地)   place an order online for eggs when it finds that there are no eggs left inside.

Are you keen on learning something new? Are you looking for application programs that can help you learn with confidence. The following apps will just suit your needs.

Quizlet

Best for: Boosting your knowledge and brushing up your skills

Whether you are brushing up on a language, gardening knowledge and cooking techniques, or having a good command of your favorite literature classics, the online learning platform, Quizlet, gives you access to over 300 million different study sets on almost any subject you can imagine for free.

Babbel

Best for: Learning a new language

As well as being a great skill to show off on holiday, learning a new language can have profound(深远的) effects on solving problems and might even give you a leg-up in your career. With classes designed to be 10-15 minutes long, Babbel encourages learning in short, yet achievable, bursts. So why not give language learning a try?

Blinkist

Best for: Bite-sized book learning

Blinkist is the perfect app to provide the key highlights from non-fiction books in both audio and text form. Whether you want to start a new business, improve your management skills, or achieve a better life balance, micro-learning app Blinkist takes key ideas from non-fiction texts and summarizes them into easy-to-consume 15-minute digests.

Remente

Best for: Improving mental well-being

Stress is something that most of us face on a daily basis—be it at work or at home—and continual worry and stress can be harmful to your health.

Whether the aim is to improve mental well-being, mindfulness, stress management or personal or professional relationships, Remente guides users through every step in order to make their goals a reality. It does this through dividing your overall aim into daily goals, making large tasks manageable and keeping you on track.

The first time I heard about my classmates engaging with social media was in the fourth grade. A few of my friends and some of my classmates had excitedly jumped onto platforms like Instagram at such a young age. On the other hand, I hesitated. I only knew the basics, but was foreign to some words on social media.

All throughout middle school, I stuck with the same thinking. And now, as a freshman in college, I am looking back and wondering why I have never been naturally interested in social media.

Scanning Instagram, you ought to find dozens of pictures of people in beautiful countries, taking part in exciting activities, and spending time with friends and family, among many other things. The thought of doing this never resonated with me. I respect and understand those who do believe using social media allows them to express themselves and share aspects of their lives with others. However, I have never had any interest in doing the same. In my eyes, family gatherings and friend get-togethers are just as, if not more meaningful when not shared with others.

Most people have experienced feeling insecure and unconfident on social media. Images that are changed represent unrealistic beauty standards that can only be obtained through dangerous ways. Even without using social media, I knew that using apps like Instagram and Facebook would make me embarrassed of all the aspects that make me a unique individual. I never wanted to look at a post on social media and immediately compare myself and my life.

I constantly observe my classmates getting easily distracted (使分心)by social media. While trying to complete their homework, they have a powerful urge to open up Instagram or Facebook to see if there are any new messages. With homework and after-class activities consuming the majority of my day, I cannot wait to finish every task on my to-do list, so I can finally spend time with my family or have some time for myself to relax from my busy day.