Pakistan can reasonably expect China to reschedule the loan payments that are due under CPEC. Before you think that China will be ready to give a massive $100 billion loan to Pakistan, consider the following:
a) Imran Khan swore to never take a loan with IMF before being elected. Like most right leaning Pakistanis, he seems to harbor a romantic notion about the Pakistani relationship with Chinese. But later, he took loans from IMF and not from China. What does it tell you?
b) Pakistan recently took a billion dollar loan from Saudi at 4% interest rate. Why would Pakistan do that if they had a cheaper Chinese option?
China (like any other country) will be willing to loan money to Pakistan (or any allied nation) based on the assumed risk - reward ratio of individual projects that the money will be directed to. CPEC works the same way. You cannot expect the Chinese to dole out arbitrary loans at rates assumed by the borrower.