Is David a snake man or a water bottle in the bizarre events of the twelve constellations?

In Adventure of the Twelve Constellations, almost all the actors play their own constellations, but David's Chen Wei is special, because his constellation is Ophiuchus, the only thirteen constellations with no opposite sign, but the director said with a smile, "David is Aquarius, the closest constellation to Ophiuchus". As a psychologist, he is a character whose thinking ability is higher than instinct, and the mysterious constellation matches the mysterious career. Make the role of David even more confusing. Instructor Li, who starred in Zhang Yimou's flowers of war, turned into Gan Wei's escort in Adventures of the Twelve Constellations. He helped her enthusiastically, but it was difficult to open his heart to her. Ophiuchus cares more about yesterday than tomorrow, which is Chen Wei's greatest strength and his lingering nightmare. Gan Wei, who played many opposite roles with David, was a Gemini with changeable personality in and out of the play. The two will have a difficult relationship for decades in the film, and an expected chemical reaction will occur between "Snake Man" and "Gemini".