Hanxin (simplified Chinese: 汉芯; traditional Chinese: 漢芯; pinyin: Hànxīn) was an notorious Chinese academic fraudulence case, committed in the name of a digital signal processing (DSP) microchip. Chen Jin, a professor at Shanghai Jiao Tong University claimed to have developed the chip in 2003. The Hanxin 1 was reportedly the first DSP chip to have been wholly developed in China. However, the chip was later revealed to have been developed by Freescale Semiconductors, a former Motorola subsidiary, with the original identifications sandpapered away.