The artist utilized colorful mosaic tomake patterns including hands, plants,circles, and the nails. Hands stand for aspirit of friendliness, as shaking handshelp strangers become friends. Plantsstand for going green, as the growthof all living organisms depend onsuitable environment. Nails stand forsustainability, as Chin-Yi was once ajunior college of technology, and nailsare part of the school’s emblem. Theround shapes stand for harmony, sincecircles are a symbol for non-conflictsand a harmonious state. With the above symbols, the work ";Echo "; meansthe schoolprovides a richly nurturing garden for the students and teachers alike, where the beautiful rainbowshines out, and Chin-Yi alumni are well-equipped and well-informed with concepts of “eco-friendly, harmony,friendliness, and sustainability”.