The lawsuits were filed in an intellectual property court in Beijing on 29 September, alleging patent infringement and asking the court for injunctive relief, Bloomberg reported.
A company spokesperson, Christine Trimble, was quoted as saying: “Apple employs technologies invented by Qualcomm without paying for them.”
The fight between the two companies has been going on even since January when Apple filed a suit against Qualcomm in the US. It followed this up with two cases in China the same month and two months later it filed a case in the UK.
Qualcomm retaliated in July, asking the US International Trade Commission to block imports of iPads and iPhones that do not include its chipsets, and to prevent the sale of such devices that are already in the US.
On 19 July, Qualcomm said it had filed lawsuits against Apple in Germany, claiming violation of its patents.
That month, Taiwan manufacturers Foxconn, Pegatron, Compal and Wistron joined Apple in the battle against Qualcomm, charging that the chip maker overcharges for patent licences and breaks anti-trust laws.
Qualcomm sued the four Apple contractors in May after they stopped paying royalties.
The patents mentioned in the Beijing lawsuit cover power management and Force Touch, a touch-screen technology that Apple uses in current iPhone models.
Apple spokesman Josh Rosenstock told Bloomberg: “In our many years of ongoing negotiations with Qualcomm, these patents have never been discussed. Like their other courtroom manoeuvres, we believe this latest legal effort will fail."
Qualcomm, based in San Diego, earns most of its sales from its processors for mobile phones. But most of its profits come from royalties on patents that cover the basics of all recent mobile devices.