Good food and clean room but training system was bad.
The receptionist stubbornly kept my original citizen ID card which was legally not required and allowed. Even after I explained to him that he had no right to keep it but OK to make a copy of its for temporary residence register with the police. But he still said it was a must to keep the original one required by the Police even though I already pre-paid my whole trip. They did not ask for deposit tho.
I was so tired after the working day so just let him keep it. He promised to return it at midnight after registration but it did not happen as I was so tired and slept early.
Once entering the room, I called the hotline of Muong Thanh group. I told her the whole story and she strongly said it was mandatory to keep the original citizen ID card for locals and passports for foreigners for the registration with police and that's the regulation. I know well it wasn't but since they said the local police asked for so I had no choice.
A few hours later, she called me back saying that the regulation did not require the original one but just the personal info of the guest. And maybe the receptionist was in rush so he didn't have time to make a copy. And I replied I told her the whole story so well that I already explained to him what was the right way and argued with him in a soft way. She then changed to say that MT has 52 hotels so they couldn't train all well and I should empathize for them.
This isn't the 1st time with MT.