During the past summer vacation, a 15-year-old boy made a model plane on his own in less than a month. Then he flew it successfully, which surprised all the people around him.

The boy named Li Banghua is from Hefei, Anhui Province. He made the plane completely by himself. The plane is 0.6 meters wide, has a wingspan (翼展) of 4.4 meters and weighs about 40 kilograms. According to a local report, Li just finished his high-school entrance exam a year ago and got good grades. After the exam, he threw himself into the work of making the model plane right away.

Li has has been interested in model plans since he was a child. Besides, he has been studying and building model planes for years. This time the model plane is the largest he has ever build and he considers it the most successful one.

Throughout the process of building the plane, he came across many failures. “But the biggest difficulty I had was that the adults couldn’t understand me well,” Li said. “When I said I was going to build a model plane, a lot of adults thought it was impossible. But I decided to keep on working hard. That is because once I start something, giving up is not a choice for me.”

What’s more, on May 1st, 2022, he took the “fire fighting drone (消防无人机)” to a test flight in the field of his hometown in Feixi County successfully.

When talking about his future, he said he dreamed of becoming a plane engineer.

【小题1】How old is Li Banghua now? (within 6 words)
_____________________________________________________________
【小题2】According to the passage, what’s the weight of the largest model plane he has ever build? (within 5 words)
_____________________________________________________________
【小题3】What was the biggest difficulty he had during the process of building the plane? (within 10 words)
_____________________________________________________________
【小题4】What do you learn from Li Banghua’s words?(To answer by writing a saying within 10 words)
_____________________________________________________________