In today’s aging society, the convenience and independence of daily life for the elderly have become increasingly important concerns. We found that many elderly individuals face significant physical strain when shopping or carrying items, and existing solutions lack intelligent assistance features to meet their growing needs. To address this, we developed an intelligent follow-along cart specifically designed to assist elderly people with shopping and transporting goods.

Judge’s Comment: "The project topic is outstanding, addressing real-world challenges with clear logic and comprehensive content. A physical prototype has been developed and successfully verified for feasibility, demonstrating excellent performance."

This project involves the development of an APP based on a carbon quota system and the design of a low-carbon town model. It explores how technological solutions can incentivize citizens to adopt low-carbon lifestyles, thereby reducing carbon emissions. Our research reveals the feasibility of achieving zero-emission transportation zones through the integration of various low-carbon technologies and infrastructure.

Judge’s Comment: "The project focuses on carbon emissions from transportation, presenting a comprehensive solution supported by thorough research. The team demonstrated strong skills in data analysis and prototyping, with an excellent overall design concept. It is recommended to further enhance user research, draw on insights from similar projects to refine the design, and explore the potential integration of carbon quota applications with commercial software."

As urbanization accelerates, traditional manual river cleaning has become inefficient and costly. This project introduces an automated cleaning boat equipped with advanced image recognition to detect floating waste such as plastic bottles and bags, paired with an autonomous navigation system for targeted cleanup. Designed with sustainability in mind, the boat uses 3D-printed and recyclable materials to reduce cost and environmental impact. “River Guardian” delivers a smart, automated solution for waterway maintenance and environmental protection.

Judge’s Comment: "The project design effectively addresses a practical problem. The overall proposal is relatively comprehensive, demonstrating clear logic, a sound design, and strong practicality. Could the product's operability be further enhanced? It is recommended to prioritize optimization for greater user convenience."

The "Forest Fire Monitoring System" includes a fire detection model with sensors for temperature, humidity, smoke, and flame, a camera cloud platform for real-time monitoring, and a control center with an OLED screen for displaying data and remotely controlling the camera. It ensures efficient forest fire prevention through real-time alerts.

Judge’s Comment: "The system demonstrates a high level of completeness. Data collection, storage, analysis, and filtering could be further refined, with potential development toward AI-based analysis."

This project focuses on protecting migratory birds in Macau by addressing the impact of noise pollution. It uses an automatic noise detection system to activate noise barriers when sound levels exceed a threshold. These barriers reduce the noise pollution in the area, ensuring a more comfortable environment for the birds.

Judge’s Comment: "It is impressive that such a large-scale project was completed by someone so young. This achievement reflects great ambition, a keen engineering mind, and rigorous logical thinking. The project was well-organized with a clear division of labor and a sound design, leading to its successful execution."

This project focuses on protecting migratory birds in Macau by addressing the impact of noise pollution. It uses an automatic noise detection system to activate noise barriers when sound levels exceed a threshold. These barriers reduce the noise pollution in the area, ensuring a more comfortable environment for the birds.

Judge’s Comment: "The chosen topic is excellent, as it originates from the student's personal interests or involvement in a specific event/activity. Furthermore, the structure and composition of the PowerPoint presentation are exemplary. Among all the projects in this final competition, I believe this one stands out as the superlative. It not only demonstrates a deep concern for the subject of their passion but also showcases their problem-solving mindset and dedicated attitude."

The members of World Little Helpers noticed that many shared bikes parked along the roadside were dirty. Since bikes are used by many people but rarely cleaned or disinfected, they can easily become breeding grounds for bacteria. During the pandemic, shared bikes posed a high risk of becoming virus transmission carriers. To address this problem, the team designed an automatic disinfection device that could be installed on street lamps.

They used ultrasonic sensors, a servo motor, and a Micro:bit controller. When the ultrasonic sensor detects that a person has parked a bike and walked away, after three seconds the cleaner automatically rotates the servo motor to aim at the bike and sprays disinfectant for 3–5 seconds before stopping. They also proposed adding a “Bicycle Parking Area” sign on the street lamp, encouraging people to park their bikes in designated spots for more accurate and effective disinfection.

Judge’s Comment: "The young inventors clearly defined the problem of bike disinfection, compared different solutions, and presented well-labeled design diagrams—excellent work! If they could further investigate existing disinfection solutions on the market, they might gain valuable insights and strengthen the implementation of their invention."

With China’s large population and the widespread use of online shopping, the pressure on logistics systems has become increasingly evident. Seeking to optimize logistics for greater convenience and resource efficiency, two students from Kunming No. 1 High School Xishan Branch designed an intelligent sorting and transportation system based on Arduino.

Their system aims to address the high cost and low efficiency of current sorting methods through several innovative improvements. Unlike traditional conveyor-belt-based sorting, their design equips transport carts with vision sensors for material classification, cleverly avoiding the complex information transfer between conveyor belts and vehicles. After classification, the carts—guided by custom programs and line-following sensors—can accurately deliver goods to designated locations. Taking pandemic safety into account, they also added an automatic disinfection module to the conveyor belt.

Judge’s Comment:
"This project demonstrates strong technical depth and originality. I especially appreciate the innovative idea of placing recognition functions directly on the transport vehicle, allowing it to decide its route based on classification results. However, the team still needs significant improvement in the testing and demonstration stages. Since the project aims to tackle the issues of high cost and low efficiency in logistics sorting, more testing—collecting data on efficiency, timing, and success rates—would be necessary to validate whether the solution truly improves these areas. Without this testing and conclusion stage, the project presentation feels incomplete."

The Rose Team wanted to solve the problem of elderly people and children being at risk during floods if they cannot evacuate in time. They designed an alarm system using a micro:bit, which can be mounted on bridges or streets. When the water level rises to a certain point, the device triggers an alarm and simultaneously sends the location information to another micro:bit at the rescue center. This data can then be uploaded online, helping residents nearby evacuate early. The prototype uses a water level sensor, two micro:bit boards, a buzzer, and a battery pack.

Judge’s Comment: "The overall project is well-completed, and the solution can effectively address real-life problems. It could be installed not only on bridges but also in low-lying areas to help prevent flood disasters. The contestants delivered their entire oral presentation in English—natural and confident. They explained the design principles very clearly and demonstrated well-prepared simulation testing."

During a night hike, the two students noticed that streetlights were not efficient in lighting and wasted significant energy. Their research showed that in a city with 10,000 streetlights, annual power consumption for lighting could exceed 20 million kWh, with about 6 million kWh wasted due to outdated technology and poor management. To solve this, they designed smart energy-saving lamps for mountain parks. During the day, a light sensor detects sunlight direction, prompting a servo motor to rotate the solar panel to absorb solar energy, which is stored in lithium batteries. At night, the stored energy powers LED breathing lights, eliminating the need for long-distance wiring while saving electricity. The system uses servo motors, LED strips, a light sensor, solar panels, and lithium batteries.

Judge’s Comment: "The idea of storing solar energy during the day and using it at night for lighting is very clear. The system integrates light sensors with actuators to track the sun’s movement and switches to nighttime illumination automatically. This is a project with considerable technical difficulty."

Through research, Gu discovered that people spend about three years of their lives in toilets, where mold, bacteria, and viruses can easily accumulate. Without regular cleaning or disinfection, a cycle of microbial growth occurs. This inspired the idea of designing a toilet disinfection device. The system uses photocatalysts combined with UVB light to form a protective film that maintains disinfection for several hours. Photocatalysts effectively decompose 99% of harmful substances, eliminate odors, and kill bacteria and viruses, including coronaviruses and E. coli. The device features an ultrasonic sensor and a light sensor. When the toilet lid is closed, the sensors work together to detect conditions, triggering the spray of photocatalyst and UV light until the surface is evenly coated. If the lid is opened during disinfection, the process immediately stops to ensure user safety.

Judge’s Comment: "The contestant addressed the important health issue of toilet disinfection. The solution is well-designed, clearly explained, and successfully tested—an excellent demonstration of functionality."

During the COVID-19 pandemic, some infections were linked to viruses lingering on parcel surfaces. Concerned about unsafe alcohol-spraying methods at home, the two students designed a UV disinfection cabinet. Using an ultrasonic sensor, the cabinet door automatically opens when someone approaches, reducing contact and minimizing cross-infection risks. Inside, UV lamps disinfect parcels with the help of two mirrors (top and bottom), reflecting UV rays in all directions for 360° coverage. The cabinet also includes an indicator light: green means available, red means the door is open, flashing red warns the door is closing, and blue indicates disinfection in progress.

Review Comments:
"This project addresses the very real problem of parcel disinfection. The prototype is well-constructed, the functions are clearly demonstrated, and the overall execution is excellent."