South Korean investors made ChangXin Technology their largest net purchase among Chinese A-shares over the month ended Aug. 18, buying $45.322233 million worth, equivalent to about 307.53 million yuan. The stock also ranked first over the previous three months. Because securities firms trading through the QFI (qualified foreign investor) channel must submit settlement instructions to KSD using an ISIN code, the stock initially appeared in SEIBro under a temporary virtual code. A review of SEIBro data suggests ChangXin Technology entered the top weekly net-buying rankings by July 28, indicating that South Korean investors had begun buying it no later than its second trading day.