Phase Ib Clinical Study of Keynatinib

All subjects shall be treated with Keynatinib twice a day (once every 12 hours), 20 mg each time, fasting within 2 hours before and 1 hour after taking the drug, and taking warm water when taking the drug. It is recommended to take the drug at the same time every day. In case of missed administration, the subjects should be instructed to take it as soon as possible when they think of it on the same day. If it is within 3 hours later than the scheduled administration, the study drug should be taken as soon as possible; if the interval is \> 3 hours, skip this time and take the next dose at the normal scheduled time. Do not take double dose at one time. Every 28 days is a treatment cycle until the specified interview completed, PD, intolerable toxicity, death occurs or withdraw from the study (including withdrawal of informed consent by the subject or termination of the study when the investigator judges that the risk is greater than the benefit), whichever occurs first.