Geniebook Chinese takes the stress out of exam prep with dual-teacher classes, immersive lessons and small group tutorials for an engaging online experience.

A chance at proficiency in Chinese — the world’s most common first language, with 1.2 billion speakers — and the tangible economic benefits that follow are obvious hooks for parents.

A Chinese genius flexed his mathematical prowess by solving a problem that flummoxed a team of mathematicians with Ph.D.s for four months in a single night. Wei Dongyi, a 30-year-old assistant ...