New Zealand has limited arable land left for developing new farms. If the nation's agricultural businesses want to expand, they should take their expertise overseas and form partnerships in countries with bigger land masses.
Key's message will also be directed at the senior investors who turn up at Boao. Many of them represent major Chinese banks.
He was expected to rub shoulders with global business chiefs like Bill Gates and possibly financier George Soros, who were among those invited to the three-day soiree.
Trade and economic ties will dominate Key's agenda in China this week.
But the tensions with North Korea, New Zealand's bid for non-permanent membership of the UN Security Council, the Global Research Alliance on Greenhouse Emissions, and Trade Minister Tim Groser's bid to be WTO director-general, were also topics expected to be raised.
Visa requirements could be relaxed
Greater visa access for Kiwi business travellers and more access to the China market through expanded landing rights will on the table during the Prime Minister's bilateral talks in Beijing this week. John Key signalled a high expectation that the current multi-entry business visa, which expires after 12 months, will be expanded.
Major tourism players have also been lobbying for New Zealand to relax its visa requirements for reputable Chinese business travellers and tourists to capitalise on surging visitor numbers.
Air New Zealand chief executive Christopher Luxon says his airline has daily services into Shanghai and Tokyo. "We want to connect with Dragon Air into the southern Chinese cities and be able to pull people out of there to Hong Kong. But their air services agreements don't allow that and they need some negotiation." But Air New Zealand is up against China Southern, which not only flies daily to Auckland but can draw on its huge Chinese domestic network.