Foremost reason is asking for help in FATF to avoid blacklisting. If that happens, all dreams of FDI, CPEC, further loans, remittances etc will be severely impacted and will push Pakistan further into bankruptcy.it is the important visit of Gen Bajwa and IK to discuss the Afghanistan peace process & India Investment future, Kashmir issue, CPEC 2nd & 3rd Phase and how to provide securities on these projects before Xi Jinping visit to India. China, Russia, Turkey, Iran, and Pakistan is emerging as a key player in a region. India is history now in the region player. Thank you, Mr. Modi, Kashmir issue was dead for us but you put the life back on almost forgotten dispute.
On Kashmir, I don't think China can do much, neither can Pakistan. It's a wait and watch game now. Wait for you time if it comes.
On Xi's visit to India, china may raise K issue but will be cautious not to harm it's trade with India....China is already reeling with slowdown in the wake of China-US trade war.
On China, "Russia, Turkey, Iran, and Pakistan is emerging as a key player in a region", since when Turkey is in the region? Key players are defined by circumstances and assisted by it's cultural influence and economic power. I don't think Pakistan is there yet. Except for Afghanistan what other card does it hold?