According to Andrea Thompson, the US Under Secretary of State for Arms Control, no negotiationhas been initiated with China regarding a possible integration into the INF Treaty. According to her, the only interlocutor today remains Russia, knowing that it has 6 months to comply with the requirements of the United States before the final withdrawal from the treaty.
The possibility of a negotiation with China had been raised by President Trump himself during his remarks concerning the American decision to suspend their participation in the treaty.
However, it would be very surprising if China, which has invested heavily in intermediate-range ballistic weapons like the DF21 and DF26, ever wanted to participate in such negotiations. Indeed, these systems, having a range between 2500 and 4500 km, are perfectly integrated into Chinese defensive strategy, particularly in the event of a possible confrontation with the United States and its allies.
The DF21D and DF26 missiles are presented by the Chinese authorities as capable of targeting an aircraft carrier at sea. Recent statements seem to support this hypothesis, even if the missiles do not have an autonomous guidance system.
It is also unlikely that Russia will comply with US demands, as President Putin has ordered the development, as soon as possible, of weapon systems with increased range, such as land-based versions of the Kalibr and Kinjal missiles.