So it had nothing to do with Softbant, who also has a stake in Grab, asking Uber to leave. The title implies Grab kicked their ass and its far from what really happened.
Most likely you're missing its a transfer pricing technique (to move profits to different entities). The actual cost of the saline from the initial supplier isn't as high.
That debt is the reason the US has a trade deficit with China. China has no economic interest in holding US debt with the exception of funding purchases of its own goods. This is also in line with the twin deficits hypothesis.
The 4s aren't surprising because of the superstition with 4, it's that you find them that is odd. To best capitalise on the property it would be apt to rename them 3B or 13B. It's a well known practice to avoid the 4 because it wastes value.