Shenzhen Kaifa Technology (Deep Tech) said its shares were flagged for abnormal trading after the cumulative deviation in closing-price gains exceeded 20% over three consecutive sessions, according to 36Kr. The company said its semiconductor packaging and testing business focuses on advanced memory chips, including DRAM, NAND flash and embedded memory. It added that its HBM technology remains in the R&D stage and is not expected to generate related sales revenue or profit in the short term. Deep Tech noted its stock has risen 57.64% from June 16 to June 30 and warned of the risk of a pullback after a rapid short-term surge.