Attention at all passengers. You can now book your train tickets on Uber and get 10% back in Uber credits to spend on your next train journey.

So no excuses not to visit your in-laws this Christmas.

Trains now on Uber. T's and C's apply check the Uber app. Hello I'm Simon Long, international editor at The Economist on today's program.

Where some see nothing at all,

we see new ways to communicate.

We are the engineers of Huawei.

The latest on the Chinese engineers of Huawei.

The latest on the Chinese tech company Huawei at the center of the American China trade war.

How illicit trade is threatening our future and the secretive world of family offices.

Money management is the main thing they do but they do a whole host of other things as well.

Legal work, tax work, even down to sort of making sure that the right drinks are in the limo for members of the family when they arrive at an airport.

Possibly the most important part of the financial landscape that you've never heard of.

Welcome to Money Talks.

First, Huawei.

The giant Chinese tech company sells more phones than Apple,

and this year became the world's second largest smartphone maker

behind Samsung.

What is the spark that leads to a new... second largest smartphone maker behind Samsung.

What is the spark that leads to a new idea?

At the beginning of December, its chief financial officer, Mangwan Joe, was arrested

as she changed planes in Vancouver in Canada.

She faces extradition to America

...