Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What's the highest rank of a PVG/ZSPD Code (IATA/ICAO) airport with a total cargo less than 2,543,394 metric tonnes?

### Inputs:
table_name: table, columns: ['Rank', 'Airport', 'Code (IATA/ICAO)', 'Total Cargo (Metric Tonnes)', '% Change']

### Response:
SELECT MAX Rank FROM table WHERE Code (IATA/ICAO) = pvg/zspd AND Total Cargo (Metric Tonnes) < 2,543,394