What did Hainan people cultivate in spring in ancient times? How much do you know about Qiongdao crops?

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When the northern country was still frozen and snowdrifting, Qiongdao was a spring and scenery, taking advantage of the spring, there were many busy figures in the field. After cultivation, the land leaves a green field scenery.
From south to north, besides traditional grain crops such as rice, edamame, pineapple, pitaya and saint-daughter fruit are more and more common in the countryside of Hainan. You can clearly feel the flourish of today's categories between sightseeing and galloping. You can't help thinking about what kind of farming tools Hainan people used to grow in spring in ancient times. How many seasons can they harvest in a year?