Yup, if Indonesia ever invest in Bangladesh it should be to penetrate Bangladesh market, not using Bangladesh as a base production since in Indonesia our labor is also relatively cheap. Indonesia can invest in noodle production like Indofood investment in Turkey (under a brand of Indomie), or tire production, lubricant factory just like Pertamina did it in China, railway coaches and shipbuilding as you mentioned already, Cement, even electronics like led TV (under a brand of Polytron) or telecommunication and infrastructure like Salim Group investment in Philippine.
But what I really like the most is excavator from Pindad. I hope this product can start competing globally.
And electric motor cycle Gesits