The preliminary report is out, referenced here:
关于“3•21”东航MU5735航空器飞行事故调查初步报告的情况通报 (variflight.com)
To my understanding, it does not discuss any causes at the moment, only declares the established facts that were debated here in much detail.
useful online translators:
百度翻译-200种语言互译、沟通全世界！ (baidu.com)
https://translate.google.com/
https://www.deepl.com/translator
https://www.bing.com/translator
Be vigilant, sometimes the negative "not" can go missing without a warning.