Juniperus Chinensis is a plant that is a functional house decoration as it has some insect repellant properties. It has some folklore usage for some things, which has spurred limited amounts of research into the herb. Nothing substantial has been conducted though.
Currently, we have lackluster fat burning potential and one study in rats on blood glucose. This study on blood glucose is actually quite remarkable in effect size, but it needs to be replicated in another animal models since the active drug it was compared to might not have been properly evaluated chosen. The effects on colon cancer cells appear to be promising, but no studies have compared the potency of the active component (Widdrol) against an active drug control or used any living models to test; currently preliminary.
It does have a historical use of being an abortifacient (inducing abortions) so it is probably prudent to not consume Juniperus containing products if pregnant; no studies have been conducted on this, however.