Later Yuen Foong collaborated with Siam Cement, Thailand's largest consortium, to construct a plant with a total investment of $ 1.76 million.
在印尼出師告捷，三年前永豐餘又與泰國最大的暹邏企業集團合作，毅然投入四千萬泰幣（約一百七十六萬美元）在泰設廠，擁有百分之四十股權。