Is “Bao Shuya strongly recommended Guan Zhong” true?

According to the 'Records of the Grand Historian: Biographies of Guan and Yan', Guan Zhong once sighed: 'My parents gave me life, but it is Bao Shuya who understands me.' In history, Bao Shuya served Prince Xiaobai of Qi, while Guan Zhong served Prince Jiu. After Xiaobai became Duke Huan of Qi, Bao Shuya, disregarding personal grudges, strongly recommended to Duke Huan his enemy Guan Zhong, who had once shot and hit the Duke's belt hook with an arrow. The detailed description of the friendship between Guan and Bao and Bao's recommendation of the worthy in Chapter 16 of the 'Chronicles of the Eastern Zhou Kingdoms' is based on real historical facts.