Because, Platycladus orientalis alias cedar, cypress. Platycladus orientalis of Cupressaceae. Leaves and branches are flat, arranged in a plane, with the same shape on both sides. It's also scaly. However, pine leaves are needle-shaped and relatively long. According to pine species, there are two needles pine, three needles pine and five needles pine. So Platycladus orientalis leaves are not pine leaves. Pine trees belong to Pinaceae, not a family.