The popularity of Chinese video-sharing social networking service TikTok continues to grow among young people in the United States, especially teens and young adults.

The service lets users create and share short videos, many of     1     are within 15 seconds. The TikTok app offers a wide choice of sounds, brief parts of songs and special effects tools    2    (produce)a video. Videos often include popular songs from famous    3    (artist) and TikTok has even helped begin the careers of new music stars.

TikTok    4    (consider) a competitor to video-sharing app Snapchat, as well as Facebook’s Instagram service. Snapchat and Instagram also mainly interest young users with photos and videos centered     5     (large) on fashion, pop culture and humor.

Last year, TikTok was the     6     (two) most downloaded app from Apple and Google stores. Only WhatsApp was downloaded more.     7     was said that people have downloaded the TikTok app 1.65billion times.

While TikTok has continued to grow, some experts and parents have expressed concerns about videos     8     (appear) on TikTok that might be    9     (harm) to young users. For this reason, they urge parents to monitor what their children watch on TikTok and suggest that only those over 16 should have access     10     the service.

The Palace Museum, also known as the Forbidden City, is a much-visited and much-photographed tourist    1    (attract). This Chinese palace with a history of about 600 years     2    (receive) millions of visits every year and lots of TV programs have shown the place in recent years.

However, it still has secrets, and a new program    3    (design) to explore those unknown areas and the stories within is set to show the palace in a new light. The variety show, Shang Xin Le Gu Gong, broadcast its first episode (一集) on Beijing TV and online streaming media site, iQiyi. com, on November 9. That first episode won wide acceptance from audiences and    4    (think) highly of on Douban. com. "It brings many elements(元素)together, and everything in the show is    5    (perfect) matched and turns out amazing," said     6     online user. "It brings me the thrill I felt when I stepped into the Palace Museum for the first time.”

In each one-hour-long episode, the actors and actresses switch between playing guides and historical     7     (figure) like emperors and royal family members of the Qing Dynasty(1644—1911). They focus on areas which are still not accessible     8     the public and the stories     9    (surround) them. In the show, the actors and actresses are also joined by designers     10     will create products based on what they see. The most popular ones, based on an online vote, are to be turned into souvenirs for sale.