An employee showcases different kinds of toothbrush fibers in Hangji town of Yangzhou, Jiangsu province, in June. [Photo/Xinhua] Common, affordable and often overlooked, the toothbrush can unspool a ...

An employee showcases different kinds of toothbrush fibres in Hangji town of Yangzhou, Jiangsu province, in June (LI BO / XINHUA ) Common, affordable and often overlooked, the toothbrush can unspool a ...