I just noticed your location Boris. I hope you are doing okay over there considering what's happening right now. Prayers out to all over there.
Many years ago I sent a variety of seeds to my friend Aleksey who lived in Kiev. He planted many of those seeds including my Lemanadarin in the Nikitsky Botanical Garden. The first to start fruiting was changsha that as it matured over the years became less seedy and was reported to produce very delicious store quality tasting fruit. Next were Ventura Lemandarin, Calamandarin, Taiwanica and Clem-Yuz 2-2. A couple years ago the Lemandarin was featured in local the news but was mistakenly called a "grapefruit" by the employee of botanical garden that was never engaged in citrus.
Here is that video:
https://www.youtube.com/watch?v=7MoeLddOPz4&list=PL88FAo1sct2J6C73M4BB8Gyzwu0rh7DZb&index=168I wonder since you are not too far from there if you have ever been there to see the plantings?