1. Picking and preliminary treatment stage. This stage includes the preliminary treatment of tea, such as picking, drying, deactivating enzymes and rolling. This stage is the first and most critical step in the transformation of Pu 'er tea, because the quality of Pu 'er tea will be directly affected by the pre-treatment.

2. Fermentation and composting stage. This stage is the core part of the transformation of Pu 'er tea. After fermentation and composting, tea undergoes complex chemical changes, forming a unique aroma and taste. The duration of this stage is closely related to humidity, temperature and other conditions, and it needs experienced workers to control it.

Step 3 stand on the stage. After the fermentation and accumulation processes are completed, let Pu 'er tea stand, so as to gradually reduce the moisture content, make the tea more stable and soft, and improve the taste and storage performance.

4. Trimming and semi-fermentation stage. This stage involves pruning, shaping and semi-fermentation of Pu 'er tea, making it more beautiful and stable in quality.

5. Aging and storage stage. The quality of Pu 'er tea will change with time. This stage involves the aging and storage of Pu 'er tea, making it more mellow and full of changes and surprises.

6. Tasting and evaluation stage. This stage is to evaluate the quality of Pu 'er tea and judge its grade, taste, aroma, color and aging degree.

7. Marketing and sales stage. The last stage is to export Pu 'er tea to the market for marketing and sales. At this stage, we need to consider packaging, channels, prices and other aspects to improve market competitiveness and achieve a win-win situation for quality and sales.