It seems the time travel is allowed in Xianxia dramas, but not for historical dramas.
I guess the logic is the Xianxia drama is already in a fantasy setting, so time travel (another fantasy setting) based on it is normal. But it's unnormal in a real historical setting 😂
Latest Info: The team is currently busy with post-production. (said by the drama producer). The variety show of the main leads (traveling to Sanya) will start shooting in late March. The drama is currently scheduled for May.
drama in May. MDL page link: https://kisskh.at/748221-100-wan-ge-yue-ding-zhi-ning-an-ru-meng