| | Trait | 1 | 2 | 3 | 4 | 5 |
| | Unit distribution | Owner unit (7, 9.86%) | Design unit (15, 21.13%) | Construction unit (11, 15.49%) | Research unit (23, 32.39%) | Others (15, 21.13%) | | Working life | Under 3 years (9, 12.68%) | 3–5 years (23, 32.39%) | 5–10 years (20, 28.17%) | 10–20 years (12, 16.90%) | Over 20 years (7, 9.86%) | | Education degree | College and below (2, 2.82%) | Bachelor degree (42, 59.15%) | Master’s degree (6, 8.45%) | Doctor’s degree (21, 29.58%) | — | | Expert title | None (4, 5.63%) | Primary title (14, 19.72%) | Intermediate title (42, 59.15%) | Senior title (11, 15.49%) | — | | Participate in Donghu project or not | Yes (61, 85.92%) | No (10, 14.08) | — | — | — | | Number of participants in similar projects | 0 (0, 0.00) | 1–3 (68, 95, 77) | 4–6 (3, 4.23) | More than 6 (0, 0.00%) | — |
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