In many situations companies begin work, or even begin to generate revenue from partnerships and JV's before the official paperwork has been processed on the business operation.
yup, looks like that's exactly what happened at SIAF's baby prawn farm. The contract was officially announced at the end of Feb '12 but Phase 1 which had lots of infrastucture works and a complete hatchery station was due to finish in April'12! Looks like the handshake happened in Nov '11 lol :)