卡拉OK出租车为唱歌的搭客提供免费搭车服务（中等水平）Karaoke Taxi Gives Free Rides to Passengers Who SingA taxi driver in Taipei, Taiwan, is offering free rides to people who are willing to sing karaoke during their trip.Tu Ching Liang, who has been working as a taxi driver for 27 years, found an interesting way to deal with the boredom of his day job — he turned his vehicle into a one-of-a-kind karaoke cab.Liang put a small karaoke machine in his car, and added loudspeakers on the outside. He offers a special deal to his passengers — if they can guess the singer and the name of a song he chooses, they get a discount. If they know the lyrics and agree to sing, they can get a free ride. Sometimes, talented singers will even get a cash prize from Liang as well.Liang told The Guardian that he feels lucky because he loves his job, even when he does
n't make any money. However, he often gets a big tip. Liang said that when he gives passengers a free ride they sometimes leave him a bigger tip than the ride would have cost."If you are happy at work, you'll earn more," Liang said.Liang also has a YouTube channel — with over 20,000 subscribers — where he shares videos of his singing customers, some of which have over 2 million views.As unusual as it may sound, karaoke taxis are quite common in Taiwan. There is even a taxi app that allows customers to choose a "karaoke" vehicle, along with other choices such as "English-speaking driver" or "wheelchair accessible."Questions1.How long has Tu Ching Liang been a taxi driver?2.Is Liang the only karaoke taxi driver in Taiwan?3.How many subscribers does Liang's YouTube channel have?