Tianhe Chemicals Group Ltd. in a filing Friday said its secretary Yeung Ming Fai has resigned and been replaced by Sun Shui, effective immediately. The Chinese additive producer, in a separate filing that day, told investors that it was shoring up the concerns that got it delisted from the Hong Kong Stock Exchange,but that it was obligated to secrecy under the Securities and Futures Ordinance regarding the details. Indian Oil Corp. lubricants will make their way into Bangladesh through a distribution agreement with Runner Lube and Energy Ltd.