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Dr. Li Wei was a forgetful but outstanding scientist in a huge lab in the southwest of China.
Every morning she sat at her P.C. to observe the grey window light before research.
Her desk was chaos — coffee cups, old tape recorders, a rag for her microscope, even toothpaste from home.
One casual afternoon, an email arrived from Mrs. Chen, a wealthy inventor from Scotland.
Written in a rigid tone, she wanted Dr. Li to help create an automatic robot to sort garbage in a dustbin, offering huge money for the product.
Dr. Li found this enjoyable.
She did a systematic review of technology, searching the internet and visiting website pages for information.
She needed access to a database of data on waste management and downloaded dozens of files — patents and technical manuals.
For the first experiment, she placed a camera — a videophone module — on the robot to test facial recognition.
She wrote software to process the feed.
Each click of the mouse made the computer dial into the network via satellite to compare images.
But the battery kept dying.
Neither Wi-Fi nor mobilephone hotspot worked.
Dr. Li found an old telephonebooth — or phone-booth — on the corner and laughed.
She pulled out her phone and called Dr. Zhang: "Can you communicate with the satellite team?
Our communication system is broken."
Dr. Zhang suggested a laser to transmit data — a strange idea, but worth considering.
After all, science explores the unknown.
Mrs. Chen arrived from Scotland, bringing a collection of rare electronic components, including a digital receiver for faint signals.
She wasn't merciful about deadlines: "Whichever method you choose, just make it work."
While sharpening pencils one evening, Dr. Li had an idea: use a telescope lens on the videophone camera to magnify waste items.
It worked — perfect accuracy!
She added a printer for labels, following a strict procedure and recording every No. and number.
Then the laser malfunctioned, hitting a dustbin and causing fire.
The situation was unsafe.
Dr. Li grabbed an extinguisher, burning her knee slightly.
She redesigned with safety shields and invented a new procedure.
Her scientific approach impressed everyone.
At the final demonstration, the robot sorted waste with instant precision.
Light reflected off its surface.
Mrs. Chen was delighted: "An outstanding invention!
I will use this technology worldwide."
Dr. Li was poor socially but rich in determination.
Looking out the window, the sky was no longer grey.
A forgetful scientist could invent something meaningful.
She sat at her P.C. and began her next proposal, ready for whichever challenge came next.