On social platforms such as chat, there is no uniform answer to the question of whether you can send a phone number to the other party when the intimacy reaches a certain value, because each platform and everyone's situation are different.

First, you need to consider the regulations and policies of the platform. Some social platforms may prohibit users from directly exchanging personal contact information to maintain the security and order of the platform. If there is such a rule in chatting, then even if your intimacy is high, you should not violate this rule.

Secondly, you need to consider each other's wishes and feelings. Even if the platform allows the exchange of contact information, if the other party is unwilling or feels unsafe to do so, you should respect the other party's decision. Before establishing any form of personal contact, it is best to have full communication and understanding with each other.

Finally, whether you choose to exchange phone numbers on the platform or not, you should be vigilant and cautious. In network communication, we should always pay attention to our own safety, don't disclose personal information easily, and avoid unnecessary harassment or injury.

To sum up, whether you can send the phone number to the other party in chat depends on the regulations of the platform, the wishes of the other party and your own safety considerations. Before making any decision, please be sure to understand the relevant regulations and respect each other's wishes and feelings.