Which country has the highest number of diplomatic missions (embassies, high commissions, consulates general or consulates, but not honorary consuls) in a single other country? The mission must be to that country, so, for example, the German mission to the United Nations in the US wouldn't be considered.
For example, the UK has 9 diplomatic missions in the US: Embassy in Washington DC, and Consulates General in Atlanta, Boston, Chicago, Houston, LA, Miami, NY and SF. This is the highest I have found so far. What other country pairs have very high numbers?