Oei Tiong Ham died in Singapore in 1924. In his will, he named nine children as heirs, one of whom was Oei Tjong Hauw, whom he appointed to lead Kian-gwan Kongsi. Under Tjong Hauw, OTHC continue to expand, opening a rubber processing plant in Sumatra and an alcohol distillery in Shanghai. Tjong Hauw also led the company to Japan and Indonesia - in this period many assets such as factories were destroyed during World War II. Tjong Hauw died suddenly in 1950.
