It still looks far too big.
From the satellite images, it's approximately 0.35 miles long.
The world's busiest railway station is Shinjuku and the main building for that is about half the length. That's for Tokyo, with about 30 million people and in a country that runs good rail services. Shinjuku also has easy access to Metro lines, which encourages people to use it.
The idea that half of China will be arriving here just doesn't work either. It's going to be at least 6 hours by train to the Chinese border and far more to the major Chinese population centres.
This will be like Makkasan. Another oversized station that will never be fully utilised.