I am furious, and if I were destroyed , I would also destroy this evil organization together. (Samson Option)
I don't know what they are like in China, but here I have been twice. Both times were over the loss of a long time relationship. The general threshold for someone committing you here is (I think) if you are believed to be a danger to self or others (there might be other criteria like hallucinations). In both cases I stayed for a week or so and was given a chance to agree with the committal before entering which made it a voluntary commitment and meant that I could leave easier/earlier. The first time was pretty helpful and I made some good friends and found that I was not that different from everyone else (honestly the other patients did me more good than the doctors), the second time (14 years later and about 10 years ago) was not that helpful but I did get some medication that I needed and had gone there to get and a therapist/psychiatrist to see after leaving. They generally don't want to keep you that long here, because it costs insurance money to do so.
My advice? Don't threaten others. We threaten others when we feel threatened; and I understand the anger (I was pretty much raging at the thought of getting committed the second time). I was trying to see a therapist or a psychiatrist the second time but the wait was too long to get an appointment and I had no job. My mom took me to the hospital to talk about getting medication there, but I knew if I talked to anyone about why I needed it they would see how bad I was and keep me there (which they did, but again, I signed for voluntary entrance at the end so it was easier to leave) But threatening others is one of the bars for getting committed and its a bad spiritual state to be in anyway. Seek God for help to remove the threatening spirit, therapist and/or medication to help talk through things, about why we feel threatened or hopeless and how to feel better. When we have no value for our own lives, sometimes the lives of others lose value too. But this is blindness - it's all of value by God who loves all, even the parts that upset us, and even us when we upset the parts.
One of the things I do to judge my own mental state is to ask myself "how much is this bothering me on a scale of 1-10?" If the answer I get back is in the 1-10 range, it's fine. If the answer is something like "50 thousand" or "250 million" then I need help, and I know I am off the rails. If I can get it back to the 1-10 range by faith in God, by letting it go, by prayer and acknowledging that's the wrong number to have, by forgiveness, it's OK. But if I can't, I need help because I can't live that way. The number can become an excuse to do harm to myself or others. I remember, there was a shooter who filmed himself before shooting people on his college campus and he said "I gave you a hundred billion chances!!" and I thought "no, you didn't - maybe there were a few, but not a hundred billion." But to him it felt that way or he imagined it that way and it fueled him for when and why he did what he did. It became his reality. Later in life when something bothered me at 250 million I remembered him and understood the danger.
Some situations and things (and a few people), I just can't deal with them, and I walk away so they aren't in my life anymore. That's OK too, I get to live my life without feeling a number like that. I try to stay away from most things that are meant to upset me (like political news channels, they keep their viewers by making them as angry as possible against another side) so it's not safe for me (frankly I don't think for anyone) to watch them. I think it would be tempting to take Samson Option on them (the political news channels) if I ever got the chance to. But ssshhh! Don't tell them! Spoilers... I want it to be a surprise

In the meantime, I go on with my life in peace, thankful I will never get the chance to, instead of looking for chances to. For there is no peace in Sin.
Another thing that helps me is to write what is upsetting me onto paper. Inside my head, there is no perspective. Something that is small can feel enormous, and if I am angry about it, it gets bigger with no limit. And then I am scared to talk to anyone about how big it is, it has become a mountain. But if I write it on paper (just a few words, mind you, not a rambling paragraph or treatise), suddenly it is small again. I ask God to help me write the truth of it, just the truth in a few words. It is private between me and God; there is no fear. Maybe I see that it was a lie in the first place or a false thought, or even something that I myself am guilty of or in. Suddenly it is out of my head, just the fact and truth of it, not the feeling, but
the fact or truth behind the feeling is on the paper, and I can repent, dismiss or even laugh at many of the things. "Why was this bothering me so much???" The mountain is gone, "cast into the sea". And the Truth has set me free.
I hope this was helpful for you. God bless and keep you and deliver you from all that upsets you into His Peace.