OK, more rumors on KJU's death citing a Hong Kong source. That "source" is an unverified Weibo post by Vice Director of HKSTV Hong Kong Satellite Television Qing Feng 秦枫, niece of former Foreign Minister Li Zhaoxing 李肇星; a thread:

Text: 有些人愿意等着官宣 真请自便 , 我只说事实 .
当年金日成去世晚了三十四 , 金正日晚了五十一小时 , 看看这次晚多少个小时官宣 ?
对了 , 李文亮医生那晚对着体抢救很久。。。
我从来不发假消息 ~ 另 ,
他在不在的中朝友谊也万古长青啊 。
消息来源渠道不一样分析水平也不一样
同行就别较劲了跟我

Translation 1/3 :
Some people are willing to wait for official announcement / really please do as you like, I'm only saying the truth.
When KIS died, there was a delay of 34 hours, KJI was late 51 hours, let's see this time how many hours late the official announcement will be?

Translation 2/3:
Right, Dr. Li Wenliang was later proved right on his health warning but only after a long time.
I've never put out false information ~ Also,
Whether he's with or not with us, the NK-China friendship is everlasting.

Translation 3/3:
Sources of information not the same, analysis level also not the same.
Other journalists don't compete with me.

She's confident here, comparing herself to Wuhan whistleblower Dr. Li and saying her sources are on another level; but she does not /authoritatively say with evidence/ that KJU is dead in this particular post. The other post is just... candles

Qin Feng's post has been reshared in various forms - Combined with ongoing rumors of a delegation of 50 doctors from 301 Military Hospital + the CCP's International Liaison Dept head Song Tao 宋涛 going to Pyongyang, it's a heady set of Chinese-language rumors about KJU's status.

One last note: Some screengrabs include her most recent post before disappearing for the weekend.

各位亲 我真不自己删微博，可能你们评论太嗨了，上面顾全大局吧哈哈哈哈 祝大家周末愉快

She jokes that she didn't delete the KJU post herself. See for yourself:

https://www.weibo.com/u/1663010745 

Last last note. Credit where credit is due, I found these screengrabs via @shijianxingzou, who compiled them. 多谢！ https://twitter.com/shijianxingzou/status/1253696574800216067