Sentence:  From the ground, Colombo's port does not look like much....  But viewed from high up in one of the growing number of skyscrapers in Sri Lanka's capital, it is clear that something extraordinary is happening: China is creating a shipping <WSD>hub</WSD> just 200 miles from India's southern tip. 
Meaning of the word marked with <WSD> tags:  A point where many routes meet and traffic is distributed, dispensed or diverted.