Looking at the attacking output of these two U19 sides in normal, full-strength matches, the under 3.25 line is a clear, consistent pick. China U19's only full-strength U19 match in this tournament was their 1-0 win over Tunisia, a tight, low-scoring game, while Colombia's normal U19 games have also been far tighter than their chaotic defeat to Saudi Arabia. Both teams are much weaker in attack against opponents from their own age group, and with so much on the line, they are likely to be cautious, leading to a low-scoring game that covers the under line.