This story is not historical fact. The date of Yinreng's deposition and death has been moved earlier; you can think of it as a parallel world.
This is just a what-if idea about Yinreng. Please don't flame me.
They say the deposed crown prince, the emperor's second son and the only child of Empress Renxiao, died clutching a kite the emperor had made for him by hand when he was little. After his death, only a young eunuch truly wept for him.
Timeline:
Ninth month of the 37th year of Kangxi: Crown Prince deposed for the first time. Yinreng, 26.
Twenty-second day of the first month of the 38th year of Kangxi: Crown Prince reinstated. Yinreng, 27.
Tenth day of the third month: Investiture ceremony.
Thirtieth day of the ninth month of the 41st year of Kangxi: Crown Prince deposed for the second time. Yinreng, 30.
42nd year of Kangxi: Hongxi, Hongjin, and the Third Princess die of illness one after another. Yinreng, 31.
Third month of the 43rd year of Kangxi: Second Princess Consort Guwalgiya dies of illness. Yinreng, 32.
Fourteenth day of the twelfth month of the 43rd year of Kangxi: Yinreng dies of illness at Xian'an Palace, aged 32.
Theme: What if history had what-ifs?