An Indonesia studies expert, interviewed during the Thai PM's visit to Indonesia, says Thai firms should move from buy-and-sell trade to joint ventures. Target sectors are EV and battery supply chains, halal food, agriculture and processing, health, and digital economy. Indonesia has banned raw-mineral exports to push processing onshore. Short-term markets are volatile after populist spending worries. Thai SMEs looking at Indonesia should study local regulations and regional cultural differences before committing capital. The article gives no deal terms or deadlines.