When Great Britain handed Hong Kong back to China in 1997, it did so under the formula of “one country, two systems.” Though officially controlled by Beijing, Hong Kong maintained a separate governing, legal and financial system than the mainland. Starting Monday, however, the relationship is changing to something more like “one country, two a-bit-more-connected systems.” That’s because of Shanghai-Hong Kong Stock Connect, a pilot program that is linking the stock exchanges of the two metropolises together.